To Make Vegetarian: omit the sausage and instead, when you add the shallots, also add 2 tablespoons olive oil, 2 teaspoons smoked paprika, 1-2 teaspoons crushed red pepper flakes, 1 teaspoon fennel seeds, 1 teaspoon mustard seeds, 1 teaspoon onion powder, and a pinch each of salt and pepper.