Cheeseburger Casserole

I found this easy recipe from Bisquick.  It literally is a cheeseburger without the bun.

IMPOSSIBLY EASY CHEESEBURGER PIE

• 1 pound ground beef
• 1 large onion, chopped (1 cup)
• 1/2 teaspoon salt
• 1 cup shredded cheddar cheese
• 1/2 cup Original Bisquick mix
• 1 cup milk
• 2 eggs

Heat oven to 400 degrees.  Spray a 9 inch glass pie plate with cooking spray.  In a skillet, cook the beef and onion over medium-high heat, stirring frequently, until beef is cooked.  Drain the beef.  Stir in salt.  Spread in pie plate; sprinkle with cheese

Stir remaining ingredients in a medium bowl with wire whisk or fork until blended.  Pour into pie plate.

Bake about 25 minutes or until knife inserted in center comes out clean