Place the beef in a large bowl and sprinkle with 1 ½ teaspoons kosher salt, pepper, garlic powder, and thyme. Set aside.
Turn a 6-quart or larger electric pressure cooker to sauté. Add the oil and butter. As soon as the butter melts, add the onion and remaining 1/2 teaspoon salt. Cook, stirring often, until the onion begins to soften but does not brown, 3 to 4 minutes.
Add the beef. Cook, stirring occasionally, until the meat is browned on all sides, about 6 to 8 minutes.
Add the Worcestershire sauce and bay leaf. Splash in about 1/2 cup of the beef broth. Stir, scraping a wooden spoon or spatula along the bottom of the pot, to ensure you remove any stuck-on bits of food (this will avoid a “burn” warning…also, those browed bits are delicious!). Add the next 4 1/2 cups broth.
Cover and seal the pressure cooker. Cook on manual (high) pressure for 10 minutes. When the time is up, immediately vent to remove any remaining pressure.
Carefully open the lid and remove the bay leaf. Then, add the egg noodles. Turn to sauté and bring the mixture to a simmer. Cook until the noodles are tender, about 18 to 20 minutes. Stir the pot every few minutes, and scrape a spoon or spatula along the bottom to prevent the noodles from sticking.
While the noodles cook, in a small bowl whisk together the cornstarch and water to create a slurry. As soon as the noodles finish cooking, add the slurry and stir to combine. Stir in the peas. If the noodles are thicker than you would like, splash in additional beef broth until you reach your desired consistency. Serve hot, sprinkled with fresh parsley or thyme.
TO STORE: Store cooked and cooled beef and noodles in an airtight storage container in the refrigerator for up to 3 days.
TO REHEAT: Place leftovers on a microwave-safe plate and reheat gently in the microwave until warmed through. Alternatively, you can reheat it gently on the stovetop. The noodles will absorb some of the broth as the mixture sits in the refrigerator, so add additional liquid (more broth or even water) to thin it back out as needed.
TO FREEZE: Store cooked and cooled beef and noodles in an airtight, freezer-safe container in the freezer for up to 2 months. Let thaw overnight in the refrigerator before reheating.