Boil a pot of water to peel the tomatoes and prepare a bowl of ice water alongside.
Wash all the vegetables.
Remove the tops of the tomatoes and make a small slit. Then, place the tomatoes in boiling water for around 30 seconds until the skin peels slightly. Take them out and place them in the iced water to stop the cooking process. Peel the tomatoes and cut into large quarters. Set aside.
Peel and chop the onions.
Cut the zucchini into 1 cm cubes.
Quarter the peppers and remove the seeds. Cut into 1 cm strips.
Cut the small green peppers into rings.
Cut the eggplants into 1 cm cubes.
Heat the olive oil in a frying pan. Sauté each ingredient independently, reheating the olive oil between each one.
Start with the onions and tomatoes and set aside. Then, sauté the peppers and set aside. After that, sauté the eggplant, adding as much olive oil as needed until cooked.
Deglaze the skillet with vegetable stock (or water).
Pour all the vegetables and vegetable stock into a large stockpot.
Season with salt & pepper to taste.
Add thyme, bay leaves, and crushed garlic cloves.
Simmer for 30 minutes over low heat, and then enjoy!