Hunter's Venison Casserole

Name: Hunter's Venison Casserole
Prep time: 25 min
Cook time: 35 min
Total time: 1 h
Cuisine: American
Ingredients: 2 cups buttery mashed potatoes; 1 pound lean ground venison (or other big game); 1 tablespoon canola oil; 1 red onion, chopped; 2 cloves garlic, minced; 2 stalks celery, diced; 0.5 cup diced red bell pepper; 1 tablespoon Worcestershire sauce; 0.5 teaspoon salt; 0.25 teaspoon pepper; 2 eggs, beaten; 1 cup cottage cheese; 2 tomatoes, sliced; 1 cup shredded Colby Jack or Cheddar cheese