2Heat 2 tablespoons of oil in a large oven-safe skillet over medium-high heat. Add sausage and cook until beginning to brown, 2 to 3 minutes. Remove from the skillet to a paper-towel-lined plate. Set aside.
3Add sweet potato to the skillet. Cook, stirring frequently, until lightly browned. 5 to 6 minutes. Add remaining 2 tablespoons oil, eggplant, and shallots. Cook, stirring frequently, until slightly softened, 4 to 5 minutes. Stir in zucchini, tomatoes, salt, pepper, and reserved sausage.
