Preheat the Oven:

• Preheat your oven to 375°F (190°C).

Cook the Ground Beef:

• In a large skillet, cook the ground beef over medium heat until browned, about 7-8 minutes.
• Drain any excess fat and return the beef to the skillet.
• Add the diced onion and garlic to the pan and cook for 2-3 minutes until softened.

Prepare the Sauce:

• Stir in the cream of mushroom soup, sour cream, salt, pepper, and smoked paprika (if using).
• Mix until well combined and heated through.

Assemble the Casserole:

• In a greased 9×13-inch baking dish, spread the beef mixture evenly across the bottom.
• Layer the frozen tater tots on top of the beef mixture, covering the surface completely.

Add the Cheese:

• Sprinkle the shredded cheddar and mozzarella cheese over the tater tots.

Bake:

• Bake the casserole in the preheated oven for 35-40 minutes or until the tater tots are golden brown and crispy.

Add Bacon:

• Sprinkle the crumbled bacon on top of the casserole and bake for an additional 5 minutes to heat the bacon through.

Garnish and Serve:

• Garnish the casserole with sliced green onions before serving.