Using a greased pan add the ham, spinach, tomatoes and green onions and start to sauté on a low-medium heat.
In a small bowl combine the eggs, milk and Clabber Girl Baking Powder and whisk together until well blended.
Then add the egg mixture to the pan with the meat/vegetable mixture. Move pan around so egg mixture is evenly spread.

Cook until bottom side is slightly browned and eggs are not runny. The top of the eggs will get some bubbles.
Add shredded cheese on one side of the top of the circle.

Gently fold over one side once. Flip omelet and cook thoroughly.

Place cooked omelet on plate and top off with extra sprinkle of cheese and green onions.