Created by dienia b on May 14, 2020
Step 1: Heat butter in skillet
Step 2: Add onion
Step 3: In bowl mix egg and mustard. maille is kinda grainy .
Step 4: Pour into pan
Step 5: Sprinkle over ham and cheese when almost set
Step 6: Put the tomato slices on half
Step 7: Flip in half and serve