Step 1

Preheat oven to 350°. In a large skillet, cook and crumble beef, salt and pepper until beef is no longer pink. Drain beef; remove from skillet.

Step 2

In same skillet, heat oil over medium heat. Add onion; cook and stir until tender, 2-3 minutes. Add garlic; cook 1 minute longer.

Step 3

Add beef, mixed vegetables, kidney beans, tomatoes, beef stock and chili seasoning; bring to a boil. Cook and stir until thickened, about 5 minutes. Transfer to a greased 13x9-in. baking dish. Heat mashed potatoes according to microwave package directions; spread over top of beef mixture.

Step 4

Sprinkle with cheese; bake until bubbly and cheese is melted, 15-20 minutes. Cool for 5 minutes; sprinkle with green onions and Parmesan cheese.