If creamy pasta makes you weak in the knees, white lasagna is going to be right up your alley. You’ve got to try it. Unlike lasagnas made with marinara, here, you won’t find a drop of red sauce in sight. You’ll find layers of hearty pasta, ricotta, mozzarella, Italian sausage crumbles, and an entire pound of fresh spinach. But what makes white lasagna so special and totally irresistible is the creamy white sauce that blankets each layer throughout the casserole. Ready to get cooking? What Is the White Sauce in Lasagna Made Of? The white sauce used in this lasagna is béchamel. It’s thick and incredibly creamy, although not too rich or heavy. Béchamel is one of the five building-block sauces in French cuisine, and is made with a roux (equal parts butter and flour) mixed with milk, and seasoned with salt, pepper, and often a pinch of ground nutmeg. …