Cheesy Tortellini with Meat Sauce

Ingredients

• 2 tablespoons chopped fresh parsley
• 2 tablespoons tomato paste
• 1/2 teaspoon salt
• 1 cup chopped onion
• 1 tablespoon Italian seasoning
• 2 cups chicken broth
• 1 teaspoon garlic powder
• 1 1/2 cups shredded mozzarella cheese
• 1 cup mini pepperoni, divided
• 1 pound ground Italian sausage
• 1 (19-ounce) package refrigerated cheese tortellini
• 2 cups fire-roasted diced tomatoes, undrained
• 1/4 teaspoon crushed red pepper flakes