1Heat oven to 375°F. In 2-quart saucepan, heat beef, frozen vegetables, onion and gravy to boiling over medium heat, stirring frequently. Boil and stir 1 minute. Keep warm.
2In medium bowl, stir dry potatoes and hot water; let stand until water is absorbed. Stir in Bisquick mix, milk and chives until dough forms. Place dough on surface sprinkled with Bisquick mix; gently roll in Bisquick mix to coat. Shape into ball; knead 10 times. Pat into 11x7-inch rectangle. Fold dough into thirds.
3Pour beef mixture into ungreased 11x7-inch (2-quart) glass baking dish. Carefully unfold dough onto beef mixture.
4Bake uncovered 30 to 35 minutes or until crust is golden brown.