Homemade Vegetable Lasagne

Name: Homemade Vegetable Lasagne
Cuisine: European, Italian, Mediterranean
Ingredients: 1 tbsp olive oil; 1 tbsp butter; 1 medium red onion; 1 medium yellow onion; 2 tsp crushed garlic; 1 tbsp tomato purée (see note 1); 400g (14 oz) chopped tomatoes; 1 tsp dried oregano; ½ basil; 175g (6 oz) broccoli; 50g (3½ tbsp) butter; 50g (3½ tbsp) flour; 250ml (1 cup) milk; 250ml (1 cup) cream; Salt and pepper (to personal taste); pinch Nutmeg (freshly grated or powder); 250g (9 oz) fresh pasta sheets (see note 2); mozzarella (sprinkle with the heart)