One pan lasagne

Ingredients

• Oil for frying
• 500 g hk beef
• 1 onion, chopped finely
• 2 cloves garlic, chopped finely
• 2 carrots, cut into small cubes
• 2 celery leaves, chopped finely (can be omitted)
• 1 tbsp chopped tomatoes
• 2 tbsp tomato paste
• 1 tsp sugar
• 4 dl vegetable stock
• 3 dl milk
• 2 tsp oregano
• 1 tsp thyme
• Salt and pepper
• 250 g lasagne sheets
• 80 g grated mozzarella
• Fresh basil, if desired