Pre-heat oven to 220°C / 425°F / Gas Mark 7.
In a pan sauté onion and mushrooms with oil until softened.
Reduce heat and stir in crumbs, tomatoes and seasoning.
Slice courgette lengthways and carefully scoop out some of the flesh with a teaspoon.
Slice pepper in half lengthways and remove seeds.
Chop up the scoops of courgette and add to pan.
Lay vegetable "boats" in a shallow ovenware dish and spoon on filling.
Add a few tablespoons of water to the base of the dish to create some steam and cover with tin foil.
Bake for 30 to 40 minutes until vegetables are tender.