Season Beef Chunks:
Combine the beef chunks with flour, salt, rosemary, garlic powder, thyme, pepper, and onion powder in a large bowl; toss to coat evenly. Set aside.Sauté Aromatics and Deglaze:
Set the Instant Pot to sauté mode and heat the olive oil. Once hot, sauté the sliced onions for 2-3 minutes until they become tender. Add the minced garlic and cook for another 30 seconds. Stir in the tomato paste and cook for 1 minute. Pour in the red wine, beef broth, and Worcestershire sauce, then scrape any browned bits from the pot's bottom.Pressure Cook Beef:
Place the seasoned beef into the pot. Secure the lid and set the valve to sealing. Cook on high pressure for 20 minutes. Allow the pressure to release naturally for 10 minutes, then manually release any remaining pressure.Cook Vegetables:
Add the baby carrots and potato chunks to the pot. Lock the lid again, set the valve to sealing, and cook on high pressure for 10 minutes. Let the pressure release naturally for 10 minutes, then manually release any remaining pressure.Thicken Stew:
For a thicker stew, mix 1 tablespoon cornstarch with 1 tablespoon water until smooth. Stir this slurry into the stew and use the sauté function to cook for 2-3 minutes, until the liquid thickens.Finish and Garnish:
Stir in the lemon juice. Adjust seasoning with additional salt, pepper, or lemon juice as desired. Garnish with fresh minced parsley and serve.