I would ask my Mom to fix liver and onions when I needed energy to play ball. When I first had to eat liver and onions, I had to drown it in catsup. I soon learned to love them so much that I periodically order it in restaurants.
1 lb. liver, sliced thin
2 T. oil
Salt and pepper
1 large onion, sliced
Mix salt and pepper in flour. Roll liver in flour and brown lightly; add the onions. Put in casserole and bake at 350° for 1 hour.