In a large bowl, whisk together eggs, milk, and seasonings. Add in vegetables and cilantro, mix. Add in shredded cheeses and fold together.
To a large greased 9x13 pan, add in egg mixture and bake 10-12 minutes, or until eggs have set and are no longer runny.
Remove eggs and once cool, cut into 12 quarters.
Cut open English muffins, line with a sausage patty, a slice of cheese, egg, and top with the remaining half of the English muffin. Microwave until cheese melts (about 30 seconds).