Heat oven to 400°F. Line large cookie sheets with cooking parchment paper. Unroll pie crusts on work surface. Using 2 1/4-inch round cookie cutter, cut 20 rounds from each crust, rerolling dough if necessary. Place on cookie sheet; prick each round twice with fork. In small bowl, beat egg and 1 tablespoon water until well blended; brush on rounds. Sprinkle with sea salt. Bake 7 to 10 minutes or until golden brown and crisp. Cool while preparing bacon.