01 - Heat vegetable oil in a large Dutch oven or heavy-bottomed pot over medium-high heat. Season beef chuck cubes with salt and black pepper. Working in batches to avoid crowding, sear the beef on all sides until deeply browned. Transfer each browned batch to a plate and set aside.
02 - Reduce heat to medium. Add chopped onion and minced garlic to the pot, sautéing until the onion is soft and translucent, approximately 3 minutes. Sprinkle in the flour (or cornstarch) and add tomato paste, stirring continuously for 1 minute to cook off the raw flour taste and deepen the tomato flavor.
03 - Slowly pour in the dry red wine, scraping up all the caramelized browned bits from the bottom of the pot. Return the seared beef and any accumulated juices back to the Dutch oven. Add sliced carrots, celery, diced potatoes, beef stock, bay leaves, dried thyme, and paprika. Stir everything together until well combined.
04 - Bring the stew to a rolling boil, then immediately reduce the heat to low. Cover with a tight-fitting lid and let it simmer gently for 2 hours, stirring occasionally to prevent sticking and ensure even cooking.
05 - Remove the lid and stir in the frozen peas if using. Continue simmering uncovered for an additional 15 minutes, or until the beef is fork-tender, the vegetables are cooked through, and the broth has thickened to your preferred consistency.
06 - Discard the bay leaves. Taste the broth and adjust seasoning with additional salt and black pepper as needed. Ladle into bowls and serve hot.