Set your pressure cooker to SAUTE. Add butter, melt, then add garlic and onions and stir for 1-2 minutes until fragrant. Transfer onions and garlic to a dish and set aside.
Add oil to the pot. Add beef to the pot and season generously with salt and pepper. Sear the beef pieces for 3-4 minutes until just browned on the outsides.
Whisk together 1 cup of the beef broth, tomato paste, worcestershire sauce, salt, pepper, and dried herbs. Pour into pot.
Add potatoes and carrots to the pot as well as the onions and garlic you had set aside earlier.
Cover, turn vent to the SEALED position, and set to PRESSURE COOK or MANUAL for 25 minutes.
Natural release (do nothing) for 10 minutes, then turn the vent valve and let the remaining pressure release. Once float valve has dropped, remove the lid.
Set to SOUP setting. Whisk together remaining 1 cup of beef broth and the corn starch. Stir into the soup along with the frozen peas. Give it a stir as the liquid thickens and the peas heat up.
Taste, add salt and pepper as needed, and garnish with fresh thyme or parsley if desired before serving. Enjoy!