Hash Brown Pizza Recipe

Ingredients

• 5 cups frozen shredded hash brown potatoes, thawed
• 1 can (10-3/4 ounces) condensed cheddar cheese soup, undiluted
• 1 large egg, lightly beaten
• 1/2 teaspoon salt
• 1/4 teaspoon pepper
• 2 pounds ground beef
• 1 medium onion, chopped
• 1 can (4 ounces) mushroom stems and pieces, drained
• 1 can (15 ounces) pizza sauce
• 4 cups shredded pizza cheese blend, divided