Coat a muffin tin thoroughly with cooking spray.

Break each egg into a muffin cup.

Add crumbled cooked bacon or cubed ham to each cup.

If using, add chopped onion and green pepper to each cup.

Bake at 400F for approximately 12 minutes, or until eggs are set.

Let cool a few minutes, then remove egg 'patties' to a wire rack to finish cooling.

Once eggs are completely cooled, place in a large plastic freezer bag, removing as much air as possible.

Freeze until ready to use -- or ready to pack into camping cooler.

Ensure they're kept cool; they should last a week.

Pre-heat the pie irons in the campfire and then give them a good coating of cooking spray.

Place a slice of bread on one side of the pie iron.

Place an egg 'patty' in the center of the bread.

Top with half a cheese slice (folded in half to make a nice neat square on top of the egg) and a bit of salsa, if desired.

Cover with another slice of bread.

Close the pie iron, place in campfire, and cook until done -- approximately 5 minutes.

Enjoy!