Heat oven to 375°F. Spray large cookie sheet with nonstick cooking spray. In large bowl, combine cheese, ham, onions and mustard; mix well.
Separate 1 can of dough into 10 biscuits; leave second can in refrigerator. Separate each biscuit into 2 layers. Press each biscuit layer to form 3 1/2-inch round.
Place 1 rounded tablespoon cheese mixture on each dough round. Wrap dough around cheese mixture, pinching edges to seal. Repeat with remaining can of dough and cheese mixture.
Arrange 8 balls, seam side down and sides almost touching, to form ring on sprayed cookie sheet, leaving 3-inch hole in center. Arrange 14 balls, sides almost touching, around outside of first ring. Arrange remaining 18 balls around outside of second ring. Brush wreath with beaten egg. Sprinkle with sesame seed.
Bake at 375°F. for 18 to 25 minutes or until golden brown. Carefully slide wreath from cookie sheet onto 14-inch serving platter. Sprinkle with bell pepper. Place onion fan in center of wreath. Serve warm.