Wash and slice celery, carrots, and potato and add to Instant Pot.
On the stove, heat 2 cups of water and dissolve 2 bouillon cubes. Add to Instant Pot.
Add 4 more cups of water to Instant Pot.
Add oregano, thyme, and marjoram.
Set Instant Pot to cook for 7 minutes.
Tip: Depending on your taste, you may want to add other seasonings, such as garlic, onion, hot sauce.