Step 1

Preheat the oven to 350 degrees F (175 degrees C). Place a cooling rack on a rimmed baking sheet.

Step 2

Mix yellow and Dijon mustards together and spread evenly over baguette slices. Top 1/2 of the bread slices with 1/2 of the Swiss cheese and place on the rack on the baking sheet. Top each with pickle slices, ham, pork loin, and remaining cheese. Top sandwiches with remaining baguette slices.

Step 3

Spread mayonnaise over the tops of the sandwiches and sprinkle with garlic powder. Spray the bottom of a second baking pan with cooking spray and place upside-down on top of the sandwiches. Weigh down the top pan with a heavy, oven-safe item such as a cast iron skillet.

Step 4

Bake in the preheated oven for 25 minutes. Remove top pan and bake until golden brown, about 5 minutes more.