Pork and beef lasagne - Real Recipes from Mums

Ingredients

• 1 Tbsp olive oil
• 1 medium brown onion, chopped
• 3 stalks of celery, chopped
• 4 cloves garlic, crushed
• 800g pork and beef mince (I use 400g of each)
• 1 Tbsp plain flour
• 2 Tbsp red wine vinegar ( I use vinno cotto)
• 700g bottle passatta
• 1 x 400g can crushed tomatoes
• 1/4 cup chopped sage leaves
• 40g butter (unsalted)
• 2 Tbsp additional plain flour
• 2.5 cups milk
• 1.5 cups grated parmesan (or to taste, I use less)
• 250g lasagne sheets
• 2.5 cups mozarella (or to taste, I use less)
• 12 fresh sage leaves