Preheat an oven to200˚C or 390˚F and line a baking tray with baking paper or anything to make cleaning easier.
In a large mixing bowl, combine the sweet potatoes with the vegetables. Add minced garlic, parsley, pepper flakes, salt and grounded black pepper to taste. Toss together and spread on a baking tray. Drizzle with oil.
Roast for fifteen minutes under 200˚C or 390˚F. After the time is up, remove from the oven and toss in chicken sausages. Drizzle with a little oil and roast for 12-15 minutes till everything is cooked through.
Serve alone or as a side salad.