Cut the cauliflower into florets. Next, steam the cauliflower to al dente. Let cool a little and pulse the pieces in your food processor until your cauliflower looks like rice.
Put the riced cauliflower in a kitchen towel and squeeze out as much liquid as you can. Combine the eggs, salt, pepper and oregano and mix. Pour this mixture into the riced cauliflower. Mix well.
Heat the oil on medium high heat. Grab a palm full of the cauliflower mixture and place in the pan. Form into a bread like shape. Cook about 4 - 5 minutes per side - flip carefully. After cooking for about 4 minutes on the second side, add two slices of each cheese to one cauliflower bread. Cover the pan with a lid to help with the melt.
Once you have a good melt, you are done. Turn down the heat a little if you use cheese that takes a while to melt.
Serve and enjoy!