Set your instant pot to sauté mode. Once hot add in your butter (for healthier alternative, cooking spray will suffice.). Add your onion and sauté for 3 to 4 minutes until it begins to soften.
Once your onion has softened, add in your garlic. Sauté for about a minute to release the flavors of the garlic.
Press cancel on your instant pot. Add in your potatoes, thyme, nutmeg, broth, salt and pepper.
Close and seal the lid on your instant pot. Close the valve. Select pressure cook on high for 4 minutes. Once the time is done cooking, naturally release 45 minutes, then do a manual release by opening the valve.
Press cancel on your instant pot, then sauté mode. In a separate bowl mix together your milk and corn starch. Once completely mixed together, add to your instant pot. Carefully stir the corn starch mixture making sure not to mash any potatoes. Keeping it chunky. Allow it to sauté for about three minutes to thicken up.
Mix your sour cream. Once fully incorporated, press cancel on your instant pot.
Notes
This Recipe Can be Doubled: This is a great recipe for a crowd. Simply increase the ingredients proportionately or freeze for future meals.
Load it UP: Top with everything and make a Loaded potato soup
Crisps: Make your Own Parmesan Crisps to float on top