Use a cooking spray to prepare 6 or 12 muffin tins.
With a spice jar, cut precooked ham into circles and place at the bottom of the muffin tin. I tried to cut a good circle once the ham was cooked and you can see it didn't work well.
Use the same cutter to make a cheese circle and place on top of the ham. I love co-jack but you can use any kind you want.
I sometimes add a sliced canned potato or a crushed thawed tater tot on top of the cheese.
Drop an egg on top of them without piercing, but if it breaks don't fret. Then bake at 350 degrees for about 10 minutes.
I like mine with toast and they are great to take to work and nuke later. They never last long enough at my house to freeze, but if you wanted to make a bunch then try one, let us know!!