Cut the peppers in half and remove and discard the entire core. Lightly oil a baking tray and place the peppers on it.
Put the onion, fennel and garlic in a bowl, drizzle over some olive oil and add seasoning. Mix to coat the vegetables in oil and seasoning, and then divide them among the peppers, stuffing them inside the pepper halves.
Remove the stuffed peppers from the oven and increase the