Preheat the oven to 350°F/180°C. Spray a 2.5 quart baking dish with cooking spray and set it aside.: As the oven warms, you will notice a gentle rush of heat and a faint warm metal scent from the racks, which signals readiness; setting the oven properly ensures steady, even cooking and prevents underdone sections. Make sure the rack is centered so heat circulates evenly, a common mistake is placing the dish too close to the top where it can brown unevenly. The prepared dish should be greased so the stew releases easily when served, you want the surface lightly slick to the touch.
Cut the stew meat into bite size pieces if needed.: As you work, the beef should feel cool and slightly tacky, and uniform pieces about one to one and a half inches ensure even tenderness. The exposed flesh will be a deep red with flecks of marbling that promise succulence after the long bake. A typical error here is leaving wildly varying sizes which causes some pieces to overcook while others remain tough; trimming larger chunks down avoids that. Use a sharp knife and steady strokes to keep edges clean, which also helps the meat brown and release juices into the sauce.
Place the beef, carrots, onion, garlic, celery, tomato sauce or diced tomatoes, salt, sugar, paprika, cumin, and olive oil in a large bowl. Stir well to coat the meat in the seasoned tomato sauce. Add this mixture to the prepared baking dish.: When you combine everything, the bowl fills with layered aromas of raw onion , pungent garlic , and spices; the olive oil gives a slight sheen that helps the seasoning adhere. Toss until the beef looks evenly coated and the vegetables are thoroughly mixed in, this contact ensures the meat absorbs flavor while the tomatoes provide the braising liquid. Avoid under mixing which can leave pockets of unseasoned meat, and also be careful not to overwork the meat which can change the texture. Transfer gently so the ingredients remain evenly distributed in the baking dish.
Tuck the bay leaf into the stew. Cover the dish with foil and bake in the preheated oven for 2 hours or until the beef is tender and the liquid has slightly thickened. Stir the stew every half hour or so.: During the first hour you will see the tomato liquid simmering quietly under foil, small steam droplets collecting on the underside of the cover. As it progresses, the scent deepens into a roasted tomato and beef perfume, and the surface will show gentle bubbling through the foil. Stirring every thirty minutes encourages even cooking and prevents sticking, the sound is a soft swish as the vegetables move and juices redistribute. A common slip is removing the lid too often, which lets heat escape and prolongs cooking, so lift the foil briefly and return it promptly. You'll know it's ready when the beef yields easily to a fork and the sauce clings to the back of a spoon.
When the meat has cooked, remove the stew from the oven and find and discard the bay leaf. Stir in the frozen peas. Cover and let sit for 5 minutes to allow the peas to thaw and warm through.: Pulling the dish from the oven releases a deeper, richer aroma, and you may notice a faint steam haze rising. Removing the bay leaf is critical because it can be tough and overly aromatic if left in, so search the surface and edges carefully. When you fold in the frozen peas , they will release a sharp green scent and their bright color will contrast with the tomato sauce; covering for about five minutes lets them soften without losing firmness. Avoid adding the peas too early or they will become mushy and lose their pop, and resist the urge to over stir which can break them down. After resting, the peas should be vibrant and just warm through.
Serve over mashed potatoes, garnished with fresh parsley.: The final presentation is tactile and aromatic; spooning the stew over warm mashed potatoes produces a steam rising cloud and a comforting combination of silky starch and robust sauce. The chopped fresh parsley offers a bright herbaceous note, and visually it pops against the deep red and brown of the stew. One common oversight is serving in cold dishes which cools the stew too quickly, so warm serving bowls if possible. Plate generously so each helping has a balance of beef , vegetables, and sauce; take a moment to taste and adjust salt if needed just before serving.