1. In a large skillet or griddle set over medium heat, toast the Bolillo roll cut-side down without the addition of any fat until lightly golden and warmed through. Reserve until assembly.
2. Lightly spray the pan with cooking spray and add a ¼ of the diced onions. Season with salt and cook, stirring occasionally, until lightly browned, about 2-3 minutes. Add 3 oz of the roast beef over the onions and toss together to combine. Cover with 2 tablespoons of the blended cottage cheese then mix until evenly coated and creamy. Top with 2 slices of Jarlsberg, cut off the heat, and let it melt. Using a large spatula, scoop the mixture onto the Bolillo roll, then crown your king.
3. Repeat with the rest of the ingredients. Serve and enjoy!

*Notes*: 

• For the cottage cheese: simply blend in a food processor, or with a hand blender. You can omit this but it helps make the final product extra cheesy.