Lay a large piece of plastic wrap on your counter Unfold the first sheet of puff pastry in the center of the plastic, then roll it into a 10×12-inch rectangle. Spread with 1 1/2 tablespoons mustard, leaving a 1/2-inch border on all sides. Lay 6 ham slices on top, overlapping as needed. Top with 1 cup cheese. Sprinkle ½ tablespoon Everything Bagel.
Starting at the long (12-inch) edge, roll the puff pastry into a log. Wrap the log with the plastic wrap. Refrigerate for 20 minutes. (This makes it easier to cut in the next step.) Repeat with the second sheet of puff pastry and remaining ingredients. Preheat your oven to 375 degrees F and line two baking sheets with parchment paper.
Once the log has chilled, using a sharp, serrated knife, carefully cut each log into 1/2-inch-wide slices. (If each log is 12 inches, you will get 24 rolls from each one). Arrange the rolls 1 inch apart on the prepared baking sheets. Bake until the puff pastry is light golden brown and the cheese is hot and bubbly, about 18 minutes. Let cool slightly. Serve warm or at room temperature.
Keywords: ham, cheese, puff pastry, gruyere, gouda