Prepare the Grinder Salad by combining the mayonnaise, submarine dressing, red pepper flakes, salt, and pepper with a whisk in a mixing bowl.
Add the lettuce, banana peppers, onion slices, and parmesan to the bowl and stir to mix the salad ingredients with the dressing. Set aside.
Cut the bread in half, leaving one side connected if possible. (If the bread separates, the sandwiches will still work.
Place the bread on a baking sheet and spread butter on each side. Place under a broiler for 30 seconds to 1 minute until toasted.
Remove the bread from the oven and place meat slices on one side and cheese slices on the other. Place under the broiler for an additional minute, keeping an eye on it so it doesn't burn.
Top the meat with the Grinder Salad mixture and sliced tomatoes. Season with salt and pepper.
Put the sandwich sides together and enjoy!