Heat an oven safe skillet over medium heat on the stove.
Add in the cubed ham and cook for 2-3 minutes.
Mix in the garlic and scallions, and cook for 30 seconds more before removing the skillet from the heat.
In a bowl, whisk together the eggs and heavy whipping cream.
Pour the egg mixture over the meat in the skillet.
Top with salt and pepper to taste.
Sprinkle on the mozzarella and cheddar cheeses.
Place the skillet into the oven, and bake for 35-40 minutes until the eggs are cooked through, and the top has begun to brown. Let sit for several minutes, and then serve.