Grease 10 by 1½ inch pie plate. Brown beef and onions with salt and pepper. Spread in pie plate. Beat milk, Bisquick,and eggs until smooth. Pour over beef mixture. Bake at 400 for 25 minutes. Spread pizza sauce on top. Then sprinkle with cheese. Bake another 5-8 minutes or until cheese is melted and knife inserted in center comes out clean.
Recipe by Amish 365 at https://www.amish365.com/the-amish-cook-impossible-cheeseburger-pie/