Beat eggs and combine with half and half, diced green chilis, salt, cumin, and 1/2 c of the shredded cheese.
Pour into a 6-inch greased metal or silicone pan, cover with foil. (if you're using glass, it will take longer to cook). Be sure to grease the pan well, since eggs stick it something fierce.
Add 2 cups of water into your Instant Pot, and place a trivet in the pot. Place the covered pan on the trivet.
Cook at high pressure for 20 minutes, allow natural release for 10 minutes and then release any remaining pressure.
Scatter remaining half cup of cheese on top of the quiche, and place under hot broiler for 5 mins until cheese is bubbling and brown.
Be sure to check out the video above to see how easy it is to make this frittata!