Crispy Sheet Pan Gnocchi with Sausage and Peppers

Name: Crispy Sheet Pan Gnocchi with Sausage and Peppers
Ingredients: 1 pound sweet Italian sausage, casings removed, crumbled; 1 teaspoon dried oregano; 1/4 teaspoon crushed red pepper flakes; 2 cloves garlic, minced; 1 small green bell pepper, thinly sliced; 1 small red bell pepper, thinly sliced; 1 small yellow bell pepper, thinly sliced; 1 small red onion, thinly sliced; 2 tablespoons olive oil; Kosher salt and freshly ground black pepper; Two 14-ounce cans cherry tomatoes; One 17.5-ounce package potato gnocchi; 1/4 cup grated Parmesan, plus more for serving; 1/4 cup fresh parsley leaves, chopped