Just use your muffin pans and spray/grease each muffin cup.
Place a piece of sandwich ham in the cup to act as your "muffin cup", add some grated cheese, carefully break an egg inside the ham, and add salt and pepper.
Bake at 275 for about 20-30 mins. (Near the end, I just keep checking them to make sure the egg is done by testing it with a toothpick.) (You can try baking them at a higher temp for a lesser time. It's sort of hard for me to gauge with my low/med./high oven. =) With a high temp, I find that the edges of ham wants to dry out.)
They make a fun fast breakfast with a sweet muffin, or a scone, some fresh fruit, and something hot to drink. =)