2 carrots, finely chopped
3 celery sticks, finely chopped
1 courgette, sliced into rounds
4 garlic cloves, crushed
150²µ/5½´Ç³ú mushrooms, quartered
1 onion, finely chopped
400g tin chopped tomatoes
400g tin green lentils, drained
4 lasagne sheets, whatever shape or size you have 
salt and freshly ground black pepper, to taste
1 tsp dried Italian herbs
2–3 tbsp olive oil
1 vegetable stock cube
75²µ/2½´Ç³ú mascarpone, to serve (optional)
50²µ/1¾´Ç³ú Parmesan (or vegetarian alternative)