Preheat oven to 180 °C.
Fry onion and garlic in oil until soft. Add lamb, rosemary, and cinnamon, cook until browned. Stir in tomato paste and chopped tomatoes, simmer 20 min.
1 tbsp olive oil, 1 onion, 2 cloves garlic, 500 g lamb mince, 2 sprigs fresh rosemary, 2 tbsp tomato paste, 1 tsp ground cinnamon, 1 tin chopped tomatoes (400 g)
Make a béchamel sauce as above.
50 g butter, 50 g flour, 750 ml milk
Layer Serena sheets, lamb sauce, béchamel, and cheese. Repeat, finish with white sauce and cheese.
200 g mozzarella, 100 g parmesan, 250 g Serena lasagne sheets
Bake 40 minutes until golden.