Place onions and mushrooms in the bottom of the Instant Pot.
Combine beef patty ingredients and form 6 patties. Brown over medium high heat (about 3 minutes per side) in a skillet. *see note
Layer beef patties over mushrooms. Combine remaining ingredients except water and cornstarch. Pour over beef and cook high pressure, 18 minutes.
Quick release. Remove patties and set aside.
Turn IP onto sautee. Combine cold water and cornstarch. Stir into the broth and let cook a few minutes until thickened. Add beef back into the sauce to coat.
Serve over mashed potatoes or rice.
NOTES:
*These can be browned in batches of two using the sautee function. However it can be difficult to flip and time consuming so I opted to use a frying pan. The choice is yours.
Source:
spendwithpennies.com