Preheat your oven to 400°F and line a large rimmed sheet pan with parchment paper for easy cleanup.
Slice the chicken sausage into half-inch rounds and dice the sweet potato into small half-inch cubes to ensure they cook through at the same rate.
Slice the zucchini into half-moon shapes about half an inch thick.
Place the sliced sausage, diced sweet potatoes, and zucchini onto the prepared sheet pan.
Drizzle the olive oil over the ingredients and sprinkle evenly with sea salt, black pepper, garlic powder, and dried oregano.
Use your hands or a spatula to toss everything together until the meat and vegetables are well-coated in oil and spices, then spread them out into a single layer.
Roast in the oven for 20 to 25 minutes, tossing the ingredients halfway through, until the sweet potatoes are tender and the sausage is beautifully browned.