Tomato Vegetable Sauce with Sausage Recipe

Name: Tomato Vegetable Sauce with Sausage Recipe
Ingredients: 4 links fresh sweet or spicy Italian sausage, casings removed (optional); 2 tablespoons of olive oil; 1 small onion, chopped; 2 garlic cloves, finely chopped; 1 zucchini, quartered lengthwise and cut into 1/3-inch pieces; 1 head of broccoli and stem, cut in florets and chopped (optional); Salt and pepper; 10 cremini mushrooms, trimmed and quartered; 26 ounces packaged strained Italian tomatoes, preferably Pomi; 26 ounces packaged chopped Italian tomatoes, preferably Pomi