For a twist, pour some olive oil into the skillet instead of coating the sandwich with butter. [4] X Research source

You can also try another type of cheese, such as Monterey Jack, for a gourmet sandwich.

Add cooked, sliced or crumbled bacon on top of the cheese. [5] X Research source Place a slice of ham on top of the cheese. [6] X Research source Sprinkle dried herbs, such as basil, oregano, or rosemary, on top of the cheese. [7] X Research source This will work especially well if you put herbs on your sandwich. Add slices of tomato and cooked bacon. [8] X Research source

If you don’t like Swiss cheese, you can try another type of cheese, such as Monterey Jack.

For a fancier sandwich, try pesto, olive oil, or hummus. You can also use mayo or a thick, creamy salad dressing, such as Ranch, Italian, or Green Goddess.

Some types of lettuce have a very thick stem in the middle. Reduce bulk by cutting this stem out with a sharp knife.

You can leave the onion rings off if you want to.

If you don’t like Cheddar, try Swiss, Monterey Jack, or Provolone instead.