Step 1: Prepare your baking sheet. Line a baking sheet with parchment paper, which prevents sticking and makes cleanup easy.
Step 2: Form the cheese base. Lay out the 6 cheese slices in a rectangular shape on the parchment paper, ensuring they slightly overlap to create a solid sheet.
Step 3: Preheat and bake the cheese. Preheat your oven to 375°F (190°C). Once preheated, bake the cheese for 6-8 minutes, or until the cheese is melted together, golden at the edges, and slightly bubbly.
Step 4: Cool the cheese. Carefully remove the baking sheet from the oven. Let the melted cheese cool for 2-3 minutes on the parchment paper. It should still be pliable but firm enough to handle.
Step 5: Add your fillings. While the cheese is still warm and flexible, carefully transfer it (still on the parchment paper) to a clean work surface. Arrange the cooked bacon, deli meat, lettuce leaves, and tomato slices across one end of the cheese sheet. If using, spread mayo, mustard, or ranch dressing lightly over the cheese before adding fillings.
Step 6: Roll up and enjoy. Starting from the end with the fillings, carefully roll the cheese sheet tightly into a log, using the parchment paper to assist you. Once rolled, gently slice the roll-up in half or into smaller pieces if desired. Serve immediately and enjoy your delicious keto no-bread cheese roll-ups!