Lasagna (vegetarian)

Ingredients: (6 persons)

mozzarella
lasagnes sheets
Tomato sauce - 800g fresh tomatoes - 2 onions - 1 carrot - 3-4 cloves of garlic - olive oil - fresh basil or rosemary or
- Variant: add 1 zucchini
Béchamel sauce - 50g flour - 50g butter - 60cl milk - salt - pepper - grated nutmeg
- alternative: 2 greek yoghurt - 10cl water and nutmeg
Emmental on top (for grated aspect)