In a large saute pan, heat the olive oil over medium until shimmering. Add the onions and saute until soft. Add the sausage, bell peppers, and zucchini, and cook for 5 to 8 minutes, stirring occasionally.
Meanwhile, prepare the tortellini according to package directions in a large pot (likely, gently boil the tortellini in salted water for about 5 minutes, or until they float to the surface). Drain, or use a spider skimmer, transferring the tortellini to the pan. Gently mix the tortellini with the sausage and vegetable, taking care not to break apart the tortellini. Add the olives and continue mixing.
Pour about half of the garlic sauce over the dish and stir. Everything should be lightly coated with the sauce, and glistening. Add more sauce as necessary/desired. Finish the dish with a big pinch of salt and several grinds of black pepper.