Cut the melanzani into slices and the peppers into strips. Bake in the broiler or oven at 200 degrees until very soft. Remove from the peel with a wooden spoon, skin the peppers and chop the whole thing into small pieces. Crush garlic clove, dice onion and stir in. Rinse the tomatoes in a sieve with boiling water, remove the skin, chop and mix with the mixture. Season with salt, pepper, oil and sugar.