Preheat the oven to 350 degrees Fahrenheit/177 degrees Celcius.
Chop the onions, tomato, green chili and cilantro and set aside.
Whisk the eggs and add the red chili powder, turmeric powder and salt and mix to combine.
If adding raw veggies:
Next, add the chopped onion, tomato, green chili and cilantro and stir to combine.
If adding sautéd veggies:
Heat a frying pan or skillet on medium high heat and add the oil. Once the oil shimmers, add the onions. Sauté the onions till translucent, about a minute.
Add the rest of the vegetables and sauté some more till the tomatoes have softened. Take out of pan and set aside to cool about 3 -5 minutes and then add to the whisked eggs. Cooling the veggies will prevent the eggs from cooking from the heat of the veggies prematurely.
Pop into the oven and bake for 15 minutes. They will be puffed when you take them out of the oven but will sink as they cool.
Enjoy fresh out of the oven or cool completely on a rack before storing them in an airtight container in the fridge.
Video
Notes
You can use any green pepper but I generally use Serrano because it is just the right heat for my family. You can use jalapeno or Thai chili as well.
The measurements are for a mini muffin pan but if you don't have one, you can use a regular pan which will give you around 6 muffins.