Vegetarian tacos with tomato

Ingredients

• 2 onions
• 1 clove of garlic
• 1 courgette
• 1 red pepper
• 1 yellow pepper
• 2 tomatoes
• 2 tbsps. of sunflower oil
• 350 g of vegetarian mince
• 1 bag of taco seasoning mix (28 g)
• 12 taco shells
• 200 g of cut iceberg lettuce - Oven dish