Combine flour, salt, and pepper.
Place steak on cutting board; pound half of the flour mixture into each side of steak with meat mallet or edge of saucer.
Cut meat into 4 pieces and place in 8-inch round or 11 x 7-inch microproof baking dish.
Sprinkle remaining flour mixture over meat.
Spread onions, green pepper, and tomato paste over meat.
Pour in broth, to cover meat.
Cover with waxed paper, cook on HI (max. power) 5 minutes.
Cook on 60 (bake) 40 minutes.
Cook on 60 (bake) 10 minutes, or until meat is tender.