Mexican Frittata

Preheat oven to 325 F.

Melt the butter in a 10-inch cast iron skillet on medium heat. Add the diced onions and cook until they begin to soften, about 5 minutes (add the diced peppers 2 minutes into the cooking of the onions). Add all the spices and mix in. Add the spinach and cook until it wilts, 2 – 3 minutes. Add the oil to the pan and let heat for a minute.

Beat eggs and milk in a bowl until fully combined. Pour the eggs into the skillet. Let the eggs begin to stiffen, about 3 minutes. Pull the firm eggs to the center of the pan and let the liquid eggs cook some more. Add 3/4 or so of the cup of cheese and mix through. Let it cook for a couple of minutes.

Move to a 325 F oven. After 5 minutes of cooking, top with the remaining cheese and the pepper rings. Finish cooking in the oven for another 8 – 10 minutes. Serve and enjoy!