Add oil to 6 Quart Instant Pot and select medium Sauté setting. Allow oil to heat for 2 minutes.
Add steak to pot in even layer and cook 4 to 5 minutes or until steak is just seared, turning once halfway through. The meat does not need to be fully cooked at this point, just browned.
During the last 30 to 60 seconds of steak cooking time, stir in the garlic and cook until just fragrant.
Add bell peppers, onion, RO*TEL and taco seasoning to pot and stir to combine. Secure lid and set Pressure Release to Sealing. Press Cancel button to reset cooking program. Select Pressure Cook or Manual Setting and set cooking time for 3 minutes at HIGH pressure (pot will take about 10 minutes to come to pressure before cooking time begins).
When cooking time ends, perform quick pressure release by moving Pressure Release to Venting. Use an instant-read thermometer to check that internal temperature of steak has reached at least 160 degrees F.
Serve meat and veggie mixture hot on warmed tortillas with a garnish of chopped cilantro and lime wedges for squeezing over.
This website provides estimated nutrition information as a courtesy only. You should calculate the nutritional information with the actual ingredients used in your recipe using your preferred nutrition calculator.