In a large skillet over medium-high heat, brown ground beef and half of the chopped onion until cooked through. Add half of the minced garlic, along with the Worcestershire sauce, salt, and pepper. Cook another 30-60 seconds, then transfer to a 9x13-inch casserole dish and spread in an even layer. Preheat oven to 350°F.
1 lb lean ground beef, 1 yellow onion, 4 cloves garlic, 1 Tablespoon Worcestershire sauce, 1 teaspoon Kosher salt, 1/2 teaspoon freshly ground black pepper
Melt the butter in the same pan over medium-high heat. Add the remaining chopped onion, sautéing for 4 to 5 minutes until the onions start to soften. Add the garlic, mushrooms, salt and pepper. Cook another 1 to 2 minutes stirring occasionally.
2 Tablespoons salted butter, 8 ounces white button or crimini mushrooms, 1/2 teaspoon Kosher salt, 1/2 teaspoon freshly ground black pepper
Sprinkle the flour over the mushrooms and onions. Cook for 1-2 minutes until the flour has been absorbed. Add the beef or chicken broth, whisking well to make sure there are no lumps. Stir in the half and half.
2 Tablespoons all-purpose flour, 1 cup beef or chicken broth, 1 cup half-and-half
Bring the sauce to a simmer and cook until slightly thickened, about 5-6 minutes.
Layer ground beef mixture. Layer green bean, corn & soup mixture. Top with cheddar cheese. Top with tots arranged in straight lines. Bake 45-50 minutes until tots are golden brown and everything is heated through.
1 lb fresh or frozen green beans, 2 cups shredded sharp cheddar cheese, 1 (32-ounce) pkg. frozen tater tots, 1 cup frozen corn