For an even richer flavor, consider using a high-quality, aged blue cheese. If you prefer a smoother sauce, blend the spaghetti sauce with an immersion blender before adding it to the meat. Feel free to experiment with different cheeses! Gorgonzola or Roquefort would be excellent substitutes for blue cheese. Fontina or Gruyere could replace the provolone. Ensure the lasagna noodles are slightly overlapped to prevent gaps and maintain a cohesive structure. To prevent the top from browning too quickly, check it halfway through baking and adjust the foil accordingly.