Fifteen Kilograms of Imperfect Lemons

• 85g parmesan(or vegetarian alternative), finely grated
• 250-300g dried lasagnesheets
• 50g pine nut

For the white sauce

• 85g butter
• 85g plain flour
• 4 bay leaves
• 1 ½l milk
• good grating nutmeg

For the spinach layer

• 2 onionsfinely chopped
• 1 tbsp olive oil
• 700g fresh spinachleaves
• 250g ricotta