Preheat the oven to 350 degrees F (175 degrees C).
Bring a large pot of water to a boil. Reduce heat to medium; add bell peppers and cook until slightly softened, about 5 minutes. Drain and rinse with cold water.
Combine 3 cups spaghetti sauce, eggs, rice, onion, Worcestershire sauce, salt, and black pepper together in a bowl. Crumble in ground beef; stir until thoroughly combined.
Place peppers in a large baking dish, top sides up; fill with beef mixture. Pour remaining 2 cups spaghetti sauce over peppers. Cover dish with aluminum foil.
Bake in the preheated oven until peppers tender, filling set, and an instant read thermometer inserted into middle of peppers reads at least 160 degrees F (70 degrees C), 55 to 60 minutes. Top each pepper with 1 tablespoon cheese.
Classic Beef Stuffed Peppers · Dinner Match Lab | Dinner Match Lab