- Preheat oven to 200C/fan 180C/gas mark 6
- Lightly oil baking dish
- In a large bowl combine spinach, ricotta cheese, egg yolks, garlic, cheddar cheese, nutmeg, mushrooms, onion, red pepper, salt and half the herbs
- Fill the dry cannelloni tube with the spinach mixture, it's easier with a piping bag
- Place the tube into baking dish in a single layer
- Mix the passata with remaining herbs, sugar and white wine vinegar and season
- Pour the passata mixture over the filled canneloni
- Drizzle with olive oil and sprinkle with reserve Cheddar cheese and freshly ground black pepper
- Cover with aluminium foil and bake in preheated oven for 20 minutes
- Uncover and bake for a further 20 mintues, or until to top is crisp and pasta is tender when tested with a skewer