For a richer, less processed Alfredo, consider making a béchamel base instead of the condensed soup. If using the recipe's approach, ensure the sauce simmers gently to prevent scorching and achieves a smooth consistency. A critical step often overlooked is thoroughly squeezing excess water from the fresh spinach after rinsing or blanching; this prevents a watery lasagna. When sautéing aromatics, cook onions until truly translucent for maximum sweetness before adding garlic. Allow the finished lasagna to rest for at least 15-20 minutes after baking; this allows the layers to set and makes for cleaner slices, preventing it from falling apart when served.