Heat oven to 350°F. Line cookie sheet with foil or cooking parchment paper.
Remove pie crust from pouch; unroll on lightly floured work surface. Using 2-inch star-shaped cookie cutter, cut out 24 stars. (Reroll scraps and cut additional stars, if desired.) Lightly brush stars with egg.
Divide cheese and ham evenly among 12 of the stars. Place second star on top of each; gently press edges to seal. Place on cookie sheet. Lightly brush tops with egg.
Bake 10 to 15 minutes or until golden brown. Serve warm.