Bring 1/4 litre of water, 1 tablespoon of oil and 1 teaspoon of salt to the boil in a large frying pan. Remove the pan from the heat and stir in the couscous, let it swell for 2 minutes. Take out and let it cool down. Peel the vegetable onion and cut into large pieces.
Clean, wash and cut the peppers into pieces. Clean and wash the zucchini, cut them in half lengthwise and slice them. Tomatoes wash, clean and cut into pieces. Heat 2 tablespoons of oil in a frying pan.
Sauté the vegetables, except the tomatoes, in it. Add the tomatoes and tomato paste, season with herbs from Provence, salt and pepper. Add 1/8 litre water, bring to the boil and simmer for about 5 minutes. Wash the thyme, pluck the leaves from the stems.
Mix cheese, thyme and couscous. Put the vegetable mixture into 4 small or 1 large casserole dish. Pour the couscous mixture as a topping on top. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for about 15 minutes.