Heat oven to 425°F. In 8-inch skillet, cook sausage over medium-high heat 6 to 8 minutes, stirring occasionally until thoroughly cooked; drain well. Stir in garlic powder and 1/4 cup of the pizza sauce.
Remove 1 crust from pouch. On work surface, roll into 13-inch round. With 3-inch round cutter, cut 11 rounds. Repeat with second crust.
Spoon about 1 teaspoon sausage mixture onto each round. Fold each in half; seal edges with fork. Cut small slit in top of each with sharp knife. Place on ungreased large cookie sheet. Brush each foldover with beaten egg. If desired, cut decorative shapes from remaining dough and attach with beaten egg.
Bake 9 to 11 minutes or until golden brown. Meanwhile, in 1-quart saucepan, heat remaining pizza sauce until hot. Serve warm appetizers with warm pizza sauce for dipping.