Impossible Cheeseburger Pie

I got this recipe years ago from the back of a box of Bisquick mix.
It's easy, cheap, & good.

Impossible Cheeseburger Pie

1 pound lean ground beef
1 large onion, chopped
1/2 t. salt
1 cup shredded cheddar cheese (sometimes I use more)
1/2 C. bisquick mix
1 C. milk
2 eggs

Heat oven to 400. Brown grown beef & onion until hamberger is done; drain. Spread into a greased pie plate (or any 8 or 9 inch pan). Sprinkle with salt & cheese.
Stir together the bisquick, milk, & eggs until blended. Pour over the cheese.
Bake about 25 minutes until knife inserted in center comes out clean. Cool for 5 minutes.

Here's it's served with seasoned fries. I also serve it with oven fries & green beans.
And since it's so easy & cheap & good, I usually fix this about once a month.