Italian Sausages in Tomato Sauce with Cheesy Polenta

Name: Italian Sausages in Tomato Sauce with Cheesy Polenta
Ingredients: One 10-ounce package chicken sausage, such as Aidells® Whole Blends Italian Style Margherita Smoked Chicken Links; 2 tablespoons extra-virgin olive oil; 8 multicolored baby bell peppers, quartered; 1 medium onion, chopped; 1 medium zucchini, cut into 1/2-inch chunks; Kosher salt; 1/2 cup dry white wine; 2 cups crushed tomatoes; Pinch crushed red pepper flakes; 3 cups loosely packed baby spinach; 1 cup instant polenta; 1/2 cup grated Pecorino Romano, plus a small wedge, for shaving; 2 tablespoons unsalted butter, cut into pieces; 1/2 cup fresh basil leaves, plus sprigs, for garnish