Preheat oven to 400 degrees.
Use a towel to drain the extra liquid from the riced cauliflower.
Add cauliflower and all ingredients except for tomato sauce, tomatoes and ham to a mixing bowl and mix well.
Prep a baking try lined with parchment paper and scoop the batter on to it in balls, then press down fully to create a nice, thin crust.
Bake for half an hour. Top with sauce, then slice of ham, then tomatoe slice. Put back in the oven for another 10 minutes.