First, wash the lettuce, tomatoes, and onions. Shred the lettuce into small pieces. Finally, slice your tomatoes and onions.
Start by layering 4 slices of mortadella individually on a flat surface, then layer the four pieces of ham, followed by salami and cheese. Spread ½ tbsp of mayo on each stack, making sure not to spread it to the sides, top, and bottom so that it does not drip out when rolling. Finally, add the shredded lettuce, tomatoes, and onions on top of the mayo.
Have the toothpicks nearby and ready to grab. Starting from the bottom of the cheese, gently (but as tightly as possible) roll the stack, pushing in any fillings that find their way out. When you get to the end, stick a toothpick into the sub-roll to ensure that it holds.
Dip the roll-ups in the dressing of your choice and enjoy! Store extras in the fridge, wrapped individually in plastic wrap, for up to a week. These make for a delicious and easy high-protein Keto snack.