Heat oven to 375°F Spray large cookie sheet with nonstick spray. In large bowl, combine cheese, ham, onions and mustard; mix well.
Separate one can of dough into 10 biscuits; leave second can in the refrigerator. Separate each biscuit into two layers. Press each biscuit layer to form 3 1/2 inch round.
Place one 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 seems side down and sides almost touching, to form ring on sprayed cookie sheet, leaving a 3 inch hole in the center. Arrange 14 balls, sides almost touching, around outside of first ring. Arrange remaining 18 balls around outside of second ring. Brush with beaten egg. Sprinkle with sesame or poppy seed.
Bake at 375F for 18 to 25 minutes or until golden brown. Carefully slide wreath on serving platter and sprinkle with diced bell peper. Serve warm.