I'm not a huge fan of sausages, but they're an easy weeknight meal. Especially in a one-dish dinner like this one.
1 red onion
1 small zucchini
3 small carrots
5 sausages (we had some lovely lamb, mint and leek ones)
Chop all the vegetables quite small and arrange in a baking dish. Drizzle with olive oil and season generously. Bake at 200 C for 15 minutes. Remove from oven, rest the sausages on top of the veggies, and cook for another 20 minutes. The time may vary based on the sort of sausages, and how thick they are. Turn the sausages after 10 minutes if they're looking very brown on top.