Step 1

Heat oven to 350°F. Spray 13x9-inch (3-quart) glass baking dish with cooking spray.

Step 2

In 10-inch nonstick skillet, cook beef and onion over medium-high heat 7 to 9 minutes, stirring frequently, until brown; drain, and return to skillet. Stir in tomato sauce, brown sugar, Worcestershire sauce, mustard and salt. Cook 2 to 3 minutes, stirring frequently, until boiling.

Step 3

Place half of the frozen potatoes in single layer in bottom of baking dish. Pour beef mixture on top. Top with 1 cup of the Cheddar cheese, then the remaining potatoes, then remaining 1 cup of cheese.

Step 4

Bake 45 to 55 minutes or until casserole is bubbly and potatoes are lightly browned. Top with chopped pickles.