Preheat the oven to 320°F (160°C).
1 Wash the vegetables. Peel the onions and remove seeds and ribs from bell peppers.
2 Finely slice the onions.
3 Dice all vegetables except garlic cloves.
4 Heat the CRISTEL® sauté pan to 2/3 of the maximum power of your source of heat and add olive oil after 1 min.
5 Add onions and brown for 2 min, then add the remaining vegetables.
6 Add the garlic cloves and season.
7 Cover the sauté pan and bake in the oven for 1 hour, removing the handles.
8 Use the handles to remove the sauté pan from the oven and serve directly from the pan.