Cut the beef into smaller pieces (about 3/4-1" or so cubes) - they will cook faster and be more tender. Season them with salt & pepper. Prep the other ingredients.: The moment you smell the first cut pieces and the clean scent of fresh beef , you know the foundation is set and it primes the rest of the dish. Texture matters here, because uniform 3 quarter to 1 inch cubes ensure even cooking and predictable tenderness under pressure. When you season early, the salt begins to interact with the surface proteins, helping a better browning reaction once the meat hits hot oil. A common error is leaving irregular chunks which either become tough or fall apart, so take an extra minute to measure visually for consistency.
Add the olive oil to your Instant Pot (IP) and press the sauté button. Brown the beef on all sides (about 5 minutes total). If you think the IP will be crowded, do this in two batches. Take the meat out and set it aside, and then spoon out most of the excess fat from your IP (leave about 1-2 tablespoons).: As the oil warms and the pot begins to sizzle, the first pieces will give off a toasty, caramel aroma that signals proper searing. Browning creates the fond, those browned bits that dissolve into the liquid later for depth of flavor. Remove meat once each piece has a rich brown crust, and keep the residual fat minimal so the soup finishes clean rather than greasy. Overcrowding reduces heat and causes steaming instead of browning, which is the most frequent mistake at this stage.
Add in the onion and celery and sauté for 4-5 minutes, then stir in the garlic. Ensure any brown bits are scraped up from the bottom of the IP.: When the onion and celery hit the warm pot you should hear a gentle sizzle and soon notice softened, translucent vegetables releasing sweetness. Stirring in the minced garlic toward the end preserves its bright aromatic quality without burning it. Use a wooden spoon to deglaze the bottom and lift the fond, because those browned bits carry intense savory flavors into your broth. A common slip is letting the garlic darken too much which introduces bitterness.
Add the meat back into the IP, along with the carrots, potatoes, broth, water, Worcestershire sauce, and Italian seasoning.: Once everything is reunited, you'll see the pot transform from separate elements into a unified stew, with the broth reflecting the concentrated color of the sautéed bits. The combination of broth and water ensures a balanced base while the small addition of Worcestershire adds umami lift. Even distribution of ingredients helps the pressure environment cook everything uniformly, so nestle the vegetables around the meat rather than piling them. Avoid overfilling the pot which can interfere with proper pressurization.
Close the lid, ensure the valve is on "sealing", and then set the timer to cook on high pressure for 20 minutes. It'll take at least 10 minutes to get up to pressure.: With a sealed pot, aromas become concentrated and the air feels warmer in the kitchen while the Instant Pot builds pressure. The waiting period until full pressure is normal and part of the process, allowing connective tissue to soften gradually. Setting the correct time is critical because pressure cooking is precise; too little and the beef will remain tough, too long and delicate vegetables can disintegrate. Do not attempt to force open the lid mid cycle, as that interrupts the cooking and is unsafe.
Once the countdown has finished, let the pressure naturally release for 15 minutes, then turn the valve to release the remaining pressure.: The natural release continues the gentle cooking, smoothing textures and letting the juices settle. You will hear a quiet hiss and later a more distinct release when you open the valve. This slightly extended resting time helps the beef fibers relax and makes the potatoes creamier. Forcing a quick release too early can cause splatter or result in under tenderized meat, which is the usual misstep here.
Stir in the frozen peas and corn (I just mix the two together, but you can use one or both or neither). They will cook through really fast. Season the soup with extra salt & pepper as needed.: The frozen pieces bring a bright, sweet note and a contrasting pop of texture; stirring them in at the end preserves their color and slight snap. After integrating them, take a spoonful to taste and adjust salt and pepper, because the concentrated broth may need fine tuning. Remember that these frozen vegetables require minimal time to heat, so adding them earlier will yield a dull, overcooked texture, which you want to avoid.