This easy Beef and Cheddar Casserole combines seasoned ground beef, vibrant bell peppers, and fresh scallions with al dente egg noodles, all tossed in a creamy sour cream and Parmesan sauce. Topped generously with grated Cheddar, it's baked until golden and bubbly, offering a comforting and hearty meal for any weeknight.
To elevate the beef flavor, brown the ground beef thoroughly to develop a rich fond before adding vegetables, and consider deglazing with a splash of beef broth. Ensure noodles are cooked precisely al dente; they'll finish cooking in the oven, preventing a mushy texture. For enhanced cheese flavor, use a sharp aged cheddar. Toasting the tomato paste is crucial for deepening its complex notes and reducing acidity. Be mindful of seasoning throughout, tasting at each stage. The 10-minute resting period post-baking is vital for the casserole to set properly, ensuring clean portions and a cohesive structure.