Classic Beef Lasagne

WHAT YOU'LL NEED

• Meat sauce
• 500 g lean beef mince
• 1 medium onion, finely chopped
• 1 carrot, finely diced
• 1 stick celery, finely chopped
• 2 cloves garlic, finely chopped
• 400 g can chopped tomatoes
• 2 tbsp tomato puree
• 1 Knorr Beef Stock Pot dissolved in 200 ml boiling water
• 1/2 tsp dried oregano
• 1/2 tsp dried thyme
• Bechamel sauce
• 900 ml semi skimmed milk
• 1 bay leaf
• black pepper
• 50 g Flora Buttery
• 50 g flour
• 40 g Parmesan cheese, grated
• 175 - 200 g lasagne sheets