Chicken Meatball Polenta Bowls

Name: Chicken Meatball Polenta Bowls
Ingredients: 1 pound ground chicken; 1/2 cup whole-milk ricotta; 1/3 cup breadcrumbs; 2 tablespoons torn fresh basil, plus more for garnish; 2 tablespoons chopped fresh parsley, plus more for garnish; 1 large egg; 4 cloves garlic, minced; 1 teaspoon freshly ground black pepper; 4 1/2 teaspoons kosher salt; 1 tablespoon olive oil; 4 tablespoons salted butter; 1 pound sliced mushrooms, such as button and cremini; 1 small shallot, chopped; 2 tablespoons all-purpose flour; 3/4 cup white wine; 2 cups low-sodium chicken broth; 1/4 cup heavy cream; 1 1/2 cups instant polenta; 1/2 cup grated white Cheddar