Triple Threat Chili

Name: Triple Threat Chili
Ingredients: Cooking spray; 1 red onion, roughly chopped; 1 pound hot Italian sausage, casing removed; 1 pound ground buffalo; 1 pound ground turkey breast; 1 (8-ounce) can tomato sauce; 1 (14.5-ounce) can diced tomatoes; 1 (15.5-ounce) can red beans; 1 packet chili seasoning (recommended: seasoning packet from the Carroll Shelby Chili Kit); 1/2 teaspoon cayenne pepper; 1 teaspoon smoked paprika; 1 teaspoon red pepper flakes; 1/4 cup hot sauce; Shredded Cheddar, for serving; Sour cream, for serving; Sliced green onion, white and green parts, for serving