Cut the cleaned eggplant into cubes.
Remove the peppers' skin and seeds and cut them into strips.
Prepare the green beans and cut them in half.
Heat olive oil in a frying pan and add garlic. When you smell it, add the eggplant cubes and cook 5 minutes on high heat.
Add the green beans and peppers, stir, and cook another 3-4 minutes on high heat.
Season lightly with salt, add a little water and cover. Turn down the heat and let cook gently for 15-20 minutes, stirring occasionally.
When the vegetables are cooked, turn off the heat, put the fish on the vegetables without covering. Leave a few minutes. The fish must be just cooked or it will become tough.
Before serving, check the salt, pepper and put plenty of fresh thyme.