Shortening Slice top round paper thin in 20 cm x 15 cm strips. Liberally spread mustard over slices of meat. Saute bacon in skillet until fat is translucent, but bacon is not crisp. Can do in microwave for one minute. Place a strip of bacon on each slice of meat. Distribute onions equally on slices of meat. Roll meat and tie. Season flour with salt and pepper to taste. Sprinkle flour mixture over meat rolls. Melt shortening in fyring pan and brown meat on all sides. Add enough water to half cover meat rolls. Simmer for 20 minutes, turning.