Step 1

Slice onion. Heat a non-stick fry pan over medium high heat. When pan is hot, add olive oil. When olive oil is shimmering, turn down heat to medium low and add sliced onion.

Step 2

Cook, stirring often for 20 - 30 minutes until onions are nicely browned.

Step 3

To build sandwich. Heat oven on broil setting. On two slices of bread, spread mayo. Place ham, onions, and one red bell pepper per sandwich. Add sliced cheese. Place under broiler for just a few seconds until cheese is melting and just starting to brown.

Step 4

Place the other two slices of bread on top. Slice in half and serve.