Sautéed red deer lasagne - Lapin Liha

Ingredients

• 1 bag (500 g) of Lapin Liha’s sautéed red deer
• 1 large onion, finely chopped
• 1–2 cloves of garlic, crushed
• a dash of oil for frying
• 2 cans (400 g each) of crushed tomatoes
• 3 tbsp red pesto
• 1 dl water
• salt, pepper, and thyme
• 3 tbsp butter
• 1–3 tbsp wheat flour (or gluten-free flour)
• 6 dl milk (or oat milk)
• 1 bag (150 g) of grated cheese
• salt, white pepper
• 1–2 tbsp butter
• 1 dl of grated cheese