In a large skillet, cook the hamburger and onion until browned
Drain excess fat
Return beef to the skillet, and add in the crushed tomatoes, flour, pepper, pickles, mustard, ketchup
Mix and add mixture to a medium sized casserole dish
Top with cheese, and raw biscuits. I cut two biscuits into strips because I did have extra to cover the whole top.
Bake the length of time and temperature the biscuits need to bake
Serve Warm with an extra swirl of French's Ketchup