Crumble into a large skillet:
Cook over medium-high heat, stirring and breaking up the sausage with a spatula until it is rendered and nicely browned, about 6 minutes. Transfer the sausage to a plate and drain all but 2 tablespoons of fat from the skillet. Add:
Cook, stirring, until the vegetables are softened, about 8 minutes. Return the sausage to the skillet along with:
Simmer for 20 minutes. Add and simmer 15 minutes more: