Easy Sheet Pan Meatloaf and Potatoes

Ingredients

• 1-1/2 pounds Ground Beef (93% or leaner)
• 1 can (8 ounces) tomato sauce, divided
• 1 cup dry bread crumbs
• 1 small onion, finely chopped
• 1 egg
• 2 teaspoons Worcestershire sauce
• 1 teaspoon dried thyme
• 1/2 teaspoon salt
• 3/4 teaspoon pepper, divided
• 2 pounds red potatoes, cubed (3/4 inch)
• 1/2 teaspoon garlic salt
• 1 tablespoon packed brown sugar
• 1 teaspoon dry mustard