1Heat oven to 375°F. Spray 2 cookie sheets with cooking spray. In large bowl, stir Bisquick mix and boiling water until dough forms. Place dough on surface sprinkled with Bisquick mix; roll in Bisquick mix to coat. Knead 20 times. Divide dough into 6 balls. Return balls to bowl; cover with plastic wrap.
2Cook broccoli & cheese sauce as directed on box; empty into medium bowl. Stir in ham, onions and Cheddar cheese; set aside. In small bowl, beat egg and water with fork or wire whisk until blended; set aside.
3Pat or roll 1 ball of dough into 7-inch round. Spoon about 1/2 cup ham mixture onto half of the round; moisten edge of round with water. Fold other half of dough round over filling; press edge with fork to seal. Place on cookie sheet. Repeat with remaining dough and filling.
4Brush tops of foldovers with egg mixture; sprinkle each with 1/2 teaspoon Parmesan cheese. Cut 3 slits in top of each for steam to escape. Bake 25 to 30 minutes or until golden brown.