Step 1

Heat oven to 400°F. Spray 9-inch glass pie plate with cooking spray.

Step 2

In 10-inch skillet, cook beef and onion over medium heat 8 to 10 minutes, stirring occasionally, until beef is brown; drain. Stir in salt. Spread in pie plate. Sprinkle with cheese.

Step 3

In small bowl, stir remaining ingredients with fork or wire whisk until blended. Pour into pie plate.

Step 4

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