Pre-heat the oven to 350 and line a sheet tray with a silicone mat. Take the zucchini halves and hollow them out by scraping out the flesh with a spoon. Lay the hollowed out zucchini halves out on the sheet tray and roughly chop the flesh. Set the flesh aside. Then heat the olive oil in a large skillet with deep sides. Brown the sausage in it as you break it up. Then add the zucchini flesh, roasted peppers, onion, garlic and basil. Season the mixture with a generous pinch of the salt and pepper. The zucchini will start to release water and that’s ok. Let the mixture simmer in the zucchini water for about 15 minutes, until it all almost evaporates.