Preheat oven to 350°F and grease a 9×13-inch baking dish.

In a large skillet, cook ground beef over medium heat until browned. Drain any excess fat.

Add diced onions and bell peppers to the skillet and cook for 5 minutes, until softened.

In a mixing bowl, combine the cream of mushroom soup, sour cream, half the cheddar cheese, salt, pepper, and seasoning blend.

Stir in the cooked beef mixture and frozen potatoes until everything is well coated.

Transfer the mixture to the prepared baking dish.

Sprinkle the remaining cheese on top.

Bake uncovered for 40–45 minutes, until the top is bubbly and golden.

Let rest for 5 minutes before serving.