HAM AND CHEESE MINI CROISSANTS

Steps:

• Place dough on a lightly floured work surface; cover and let stand until butter is slightly softened, 5 to 10 minutes.
• Roll dough out to a 10-by-18-inch rectangle. Cut rectangle in half crosswise. Wrap one half with plastic wrap and transfer to refrigerator. Place remaining half on a large (about 18-by-25-inch) piece of parchment paper. Roll into a 16-by-20-inch rectangle, stopping to chill dough as necessary if butter becomes too soft; transfer to a large baking sheet and cover with plastic wrap. Transfer baking sheet to refrigerator and chill until firm, about 30 minutes. Repeat process with remaining piece of dough.
• Transfer one piece of dough to a lightly floured work surface so that one of the longer sides is facing you. Halve dough to make two 16-by-10-inch rectangles.
• Using a pizza cutter, trim a scant 1/8 inch from all sides of each rectangle of dough. Working quickly, using pizza cutter to cut each half into 1 1/2-by-3-inch rectangles. You should have about 60 rectangles.
• Place 1 slice ham in the center of each dough rectangle; top each with a slice of cheese. Starting from one short end and working toward the other, roll to enclose. Brush edges with water and gently press to adhere.
• In a small bowl, whisk egg together with 1 teaspoon water. Line baking sheets with parchment paper; place rectangles on prepared baking sheets, seam-side down, leaving room for croissants to rise. Brush tops with egg mixture, reserving remaining egg mixture. Place 3 narrow drinking glasses upside-down between each roll of dough; cover well with plastic wrap, making sure plastic does not touch dough. Let stand in a warm place until doubled in size and feel hollow when gently touched, 2 1/2 to 3 hours.
• Preheat oven to 425 degrees.
• Uncover and remove glasses from baking sheets; brush croissants lightly with remaining egg mixture (reserving remaining for second piece of dough). Transfer to oven and bake until puffed and golden, about 15 minutes. Transfer to a wire rack to cool. Repeat steps 3 through 8 with remaining piece of refrigerated dough.