Press ”saute” and “+10 minutes” on your Instant Pot.
Melt butter. Add stew beef and brown for 3-4 minutes. It’s best to brown meat in a few small batches to get the best color. Stir in previously browned vegetables and batches of meat. Stir in the tomato paste.
Add broth, salt, pepper, and xanthan gum to pot. Stir well to combine ingredients.
Turn Instant Pot off, then press “stew” and “+40 minutes.”
When the timer goes off, manually release steam. Sprinkle and stir in very small amounts of xanthan gum to desired consistency.