Cut the steak into fist-sized pieces. Put steak in a frying pan, spray with Pam, add 1/2 chopped medium onion and brown the steak on both sides. Pour 3/4 cup of water into the pan and then transfer everything to a Dutch oven. Add the tomato soup and another 1/2 cup water. Stir everything with a spoon. Add 1 tsp. salt and 1/2 tsp. pepper and stir. Bake at 350 degrees for 90 minutes--turn steaks after the first 45 minutes and then return to oven. Test with a fork--if not tender enough, bake longer.