Step 1

Add potatoes, onion, and mushroom (if using) to the bottom of the slow cooker. Add steak on top.

Step 2

In a small bowl, mix together sauce ingredients. Pour sauce into the slow cooker, wetting all the ingredients.

Step 3

Cook HIGH 2-3 hours or LOW 4-6.

Step 4

Season steaks with steak seasoning and rosemary.

Step 5

Turn the Instant Pot to saute. Once hot, add the oil and beef. Brown beef on both sides, approximately 3-5 minutes per side. Remove steaks.

Step 6

Add onion, garlic, and mushrooms and cook a few minutes until vegetables are soft.

Step 7

Add broth and deglaze the bottom by of the pressure cooker by scraping all the bits off off with a wooden spoon.

Step 8

Add steaks and potatoes.

Step 9

Close lid and seal valve. Set high pressure and cook 15 minutes. Natural release pressure 10 minutes, then quick release remaining pressure.