Preheat your oven to 350°F (175°C) and lightly grease a 9x13-inch baking dish.

In a large skillet over medium-high heat, brown 1.5 pounds of ground beef for about 5-6 minutes.

Add 1 diced medium onion to the beef and sauté for 3-4 minutes until translucent, then stir in 2 minced garlic cloves and cook for an additional 30 seconds.

In the same skillet, add 4 cups of green beans, 1 can of cream of mushroom soup, 1 teaspoon of Worcestershire sauce, ½ teaspoon of salt, ½ teaspoon of black pepper, and ½ teaspoon of paprika; mix well.

Pour the mixture into the prepared baking dish, spreading it evenly.

Sprinkle 1.5 cups of French fried onions on top of the casserole mixture.

Bake uncovered for 25-30 minutes until bubbling and golden-brown on top.

Let the casserole rest for 5 minutes before serving.