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. Brown the beef in batches without overcrowding, searing each side until a deep golden crust forms. Transfer browned beef to a plate and set aside.
02 - Reduce heat to medium. Add the chopped onion and minced garlic to the pot, sautéing until softened and fragrant, about 3 minutes. Sprinkle in the flour (or cornstarch) and stir in the tomato paste. Cook for 1 minute, stirring constantly, to cook off the raw flour taste and deepen the tomato flavor.
03 - Gradually pour in the dry red wine, using a wooden spoon to scrape up all the caramelized browned bits from the bottom of the pot. Return the browned beef and any accumulated juices back to the Dutch oven. Add the sliced carrots, diced potatoes, sliced celery, beef stock, bay leaves, dried thyme, and paprika. Stir well to combine all ingredients evenly.
04 - Bring the mixture to a full boil, then immediately reduce the heat to low. Cover the pot with a tight-fitting lid and let the stew simmer gently for 2 hours, stirring occasionally to prevent sticking and ensure even cooking throughout.
05 - Remove the lid and stir in the frozen peas. Continue simmering uncovered for an additional 15 minutes, or until the peas are heated through, the beef is fork-tender, and the broth has thickened to your desired consistency.
06 - Remove and discard the bay leaves. Taste the broth and adjust seasoning with additional salt and black pepper as needed. Ladle the hot stew into bowls and serve.