Select the SAUTÉ setting on your Instant Pot and heat the 1. 0 tbsp. (0. 5 oz / 15g) of olive oil.
Add the chopped potatoes and sauté for 3 to 4 minutes, stirring occasionally, until the edges become slightly brown.
Pour in the whisked eggs, shredded cheddar cheese, chopped ham, 0. 25 cup (2. 0 oz / 60g) of water, salt, and black pepper.
Stir the mixture well so the ingredients are evenly distributed.
Close and securely lock the Instant Pot lid. Press the CANCEL button to turn off the SAUTÉ function, then select the MANUAL (or Pressure Cook) setting and set the cooking time for 5 minutes at HIGH pressure.
Once the pressure cooking cycle is fully complete, immediately press CANCEL and perform a Quick Release to vent the steam. Carefully unlock the lid once the safety pin drops, and serve the hot hash immediately.
Cut Potatoes Uniformly: To ensure every bite of your Tasty Potato Hash cooks evenly, dice your potatoes into similarly sized pieces. This prevents you from having some pieces that are mushy while others remain too firm.
Whisk Eggs Thoroughly: For the fluffiest texture, beat your eggs vigorously before adding them to the pot. This incorporates air and creates a lighter hash.