Turn Instant Pot on Sauté mode. Add sliced onions, shallot and olive oil and cook for ~5 minutes.
Hit cancel on Instant Pot. Add CK Mondavi Cab to deglaze.
Add rump roast, sprinkle with montreal seasoning (salt, pepper, garlic).
Add broth.
Hit manual on Instant Pot and increase time to 40 minutes (make sure it is set to locked). Walk away and do a happy dance or sip on your cheese and nibble on apps.
After 40 minutes is up. Do quick pressure release (turn it from sealed to venting), add in your baby carrots and potatoes (do this in a quickish manner).
Replace the top, turn nob to locked, set to manual 5 minutes. Do NPR (natural pressure release) for 15 minutes.
