Preheat oven to 425°. Combine ground beef and Onion Onion™ Seasoning in a large skillet over medium-high heat. Cook and crumble until no longer pink; drain.
Add crushed tomatoes, diced tomatoes and Pizzeria Seasoning; simmer 5 minutes. Remove from heat and stir in cheese. Divide mixture among hamburger bun halves; place on a large baking sheet(s). Bake 15 minutes, placing under the broiler for the last 1-2 minutes.
Tip>: Make desired amount of burgers and refrigerate the remaining mixture in an airtight container for up to 3 days or freeze for up to 3 months.