Slow roast tomatoes, an easy Provençal summer side dish with garlic and herbs that burst with flavour. How to roast them in the oven and prep in just 20 minutes with my tips on how to use herbs in slow cooking.

What are Slow Roasted Tomatoes?
This French recipe is a traditional summer side dish known as Tomates à la Provençale. It couldn't be simpler: large tomatoes are halved horizontally and roasted slowly in the oven in garlic, herbes de Provence and olive oil.
It's such a classic but I've switched out the parsley with rosemary and thyme. Parsley is traditionally added at the start of cooking, but I add it at the end to preserve their vitamins and flavour.
The original recipe comes from Andrée Maureau in her handwritten book, Recettes de Provence (1991), gifted by my future parents-in-law - in their home in Provence!
The key to this dish are large tomatoes. If you have smaller Roma ones, then I recommend you try these quick sliced, oven roasted tomatoes which are then chilled and served with mozzarella as a starter or appetizer.

Slow Roasted Tomatoes - Ingredients Needed
- Tomatoes - For best results, pick large, fleshy summer tomatoes that weigh about 200-250g (8-9oz) each: e.g. beefsteak (coeur de boeuf, marmande) or heirloom. Smaller tomatoes collapse too quickly, release excess juice, and can spatter in the oven. Be sure to scoop out the seeds well to reduce moisture.
- Garlic - use garlic cloves from a bulb and avoid dried or powdered garlic. The taste is not nearly the same. If really fresh, cut finely directly but if the clove is a bit older, remove the inner core first to make it easier to digest.
- Herbs - traditionally, fresh parsley is used - but for slow cooking tomatoes, it will lose its flavour and vitamin content. To maximise flavour, use thyme and rosemary, typical herbes de Provence, at the beginning of cooking. Unlike parsley, their oils can withstand the heat (I learned this from my scientist friend, Raphaël Haumont.) So add chopped fresh parsley at the end of cooking.
- Olive oil - the best to use for authentic Provençal flavour. Drizzle rather than pour.
- Breadcrumbs - although often a small sprinkling is added, I prefer without so have marked it optional.
For more on tomato types plus herbs and cooking,
see the guide to fresh herbs and tomatoes.

Tomates à la Provençale - Best Dish To Use
Traditionally in Provence, these are baked uncovered in a ceramic gratin dish - it concentrates the flavour and is easier to clean than glass (Pyrex) if juices caramelise.
Temperatures in Provence soared to 42°C this summer. Normally I kick off the holidays by roasting vegetables in a traditional tian de legumes or fruit such as roasted figs or baked apricots with honey and lavender - they just ooze the taste of the south. But when the heatwave hit, I abandoned the idea of sweating over a hot stove. Perks of not working in a restaurant: I can skip the oven torture in the holidays!
So forgive me - these photos aren't quite what I had in mind. The tomatoes were supposed to be gleaming from a rustic Provençal baking dish, shot at my parents-in-law's house with lavender in the background. Instead, after fleeing the heat, I ended up back in Paris. And, of course, I forgot to pick up a dish at the market in Apt! So here they are in a plain roasting tin, but just as juicy, sun-kissed and ready to enjoy.

How to Roast Tomatoes in the Oven - Easy Recipe
It couldn't be simpler to roast them. Preheat the oven to 400°F/180°C
Finely chop the garlic and herbs (rosemary and thyme) or, even easier, use dried herbes de Provence.

Prepare the halved tomatoes: it's important to remove the seeds (scoop out with a little spoon). Seeds contain so much extra moisture that will make your tomatoes collapse and spatter in the oven. The seeds will fill a cup. Don't throw it out: blitz it and freeze or add it to your sauces or this lotte à l'armoricaine or Provençal Sea Bream recipe.
Keep the stem (French: pedoncule) so that there are no holes in the middle! Place them in a single layer on an oiled baking dish. Sprinkle with the garlic, herbs and olive oil, season and bake for at least an hour.

How Long to Roast Tomatoes at 400°F or 180°C?
Large, oven roasted tomatoes need to bake slowly, uncovered - at least an hour to 1 hour 15 mins in a traditional ovenware dish (preferably ceramic) at 400°F/200°C. The garlic, herbs and olive oil just work their magic while roasting.
It's important to mention the size of your tomatoes. In Provence, large fleshy ones, about 250g/8-9oz each, work best: coeur de boeuf (beefsteak), marmande, or Heirloom. Vine tomatoes are good too if they're bigger.
If you really need to cut the cooking time, slightly smaller ones work too although they'll have more water content. Bake for slightly less (35-45 minutes) and keep your eye on them so that they don't collapse.

Serving Suggestions
Roasted tomatoes and garlic are a perfect side dish to all sorts of summer dishes, such as grilled or BBQ meats, roasted chicken. Also delicious with a vegetarian dish of Mediterranean stuffed courgettes with cheese and a Corsican mint omelette.
In fact, they're great with all Mediterranean food.

Slow Roasted Tomatoes with Garlic and Herbs from Provence
Equipment
- ceramic baking dish or roasting tin that holds the tomatoes in a single layer
Ingredients
- 4-5 large tomatoes ripe but firm (200-250g/8-9oz each)
- 3 cloves garlic finely chopped
- 1 tablespoon rosemary and thyme finely chopped (or 2 teaspoon dried herbes de Provence)
- 75 ml (5 tbsp) olive oil extra virgin
- ½ teaspoon fleur de sel salt or Celtic sea salt
- few grinds of the pepper mill
- 1 tablespoon flat-leaf parsley finely chopped
- 2 tablespoon breadcrumbs optional
Instructions
- Finely chop the garlic cloves, herbs and mix together in a small bowl. Preheat the oven to 400°F/200°C (180°C fan/gas 6). Halve the tomatoes horizontally and remove the seeds (see notes below).
- Spread a tablespoon of the olive oil in the baking dish, top with the tomato halves (cut side up, stem intact) and sprinkle over the salt, pepper, garlic and herbs. Drizzle over the rest of the oil and breadcrumbs, if using.
- Roast the tomatoes for at least an hour. If they're particularly large and juicy, they can bake for up to 1 hour 20 minutes. Remove them from the oven when there's still a little juice in the cavities. Sprinkle over the freshly chopped parsley before serving.







Dave Thomson
Making Tomates à la Provençale nearing the end of the end of the tomato season was both an excellent suggestion and even with my cooking “capabilities” an excellent dish. Our local poulterer provided an excellent chicken to go with it.
Please don’t feel obligated to respond
Many thanks Jill and have a good week.
Regards, Dave
Jill Colonna
Of course I'd love to respond, Dave. Thank you for your kind words - I'm so thrilled you loved them. We've been enjoying tomatoes in salads all summer and so doing them this way is a lovely way to bridge the seasons. I love that you also served them with the chicken!
Best wishes, Jill
Sue
We really enjoyed these tomatoes and are already making this recipe again.
Jill Colonna
So happy you like them and making the most of this wonderful tomato season, Susan. Thanks x
Paul Mercer
Re Provencal tomato recipe: Yes it is very, very tasty BUT in our electric stove slow roasting at 400 for an hour created two huge problems to keep us from ever cooking it again: splattered olive oil and tomato juice all over the oven (should the dish be covered?) and the Pyrex baking dish took many attempts to clean off the burned on oil/tomato residue.
Paul Mercer
Jill Colonna
Hi Paul,
I’m pleased to hear you found the tomatoes very tasty — though I’m sorry the cooking process wasn’t as expected. This recipe is a Provençal classic, where the tomatoes are roasted uncovered so their juices concentrate and the flavour deepens.
The key here is using large, fleshy summer tomatoes (about 250 g each) and scooping out the seeds — smaller tomatoes will collapse, release more liquid, and spatter, which sounds like what may have happened. The roasting time is given as 1–1½ hours, depending on tomato size, so for smaller ones the cooking time should be reduced.
Traditionally, they’re baked in a ceramic gratin dish, which also makes cleaning easier than glass (Pyrex). I’ll update the recipe to make these points even clearer for readers.
Thanks again for your feedback — I hope you’ll give the recipe another go with large tomatoes in season, as that’s when it truly shines.