Preheat the oven to 375 degrees F. Grease a 12-cup muffin tin with nonstick cooking spray.
Roll out the pizza dough into a flat rectangle (12 by 14 inches) and cut the dough in half, making two 7-by-12-inch rectangles. Layer half the provolone on one of the rectangles in a single layer, leaving 1 inch around the edge. Then layer half the roast beef, followed by half the Caramelized Onions and some banana peppers. Repeat with the remaining dough and toppings.
Tightly roll up each portion of dough into a long log. Cut each log into 6 pieces and place each piece into a cup of the prepared muffin tin. Bake until golden brown, 10 to 15 minutes. Let cool, then pop out using a butter knife. Serve!
Set a skillet over medium-low heat and add the oil. Add the sliced onions and stir to combine with the oil. Season the onions with salt and pepper and cook, undisturbed, until the bottoms of the onions begin to caramelize, 10 to 15 minutes. Stir only once and then continue to cook, undisturbed, until the onions are golden and soft, another 5 minutes. Add water if necessary to help deglaze the pan throughout the cooking process.