I found two BEAUTIFUL large bunches of fresh spinach for this simple soup. I love spinach in salads, slightly sauteed with garlic, or cooked, but have never made a soup where spinach was the main ingredient. This couldn't be easier. Spinach, butter, onion, beef broth and some milk went together quickly. A little nutmeg and some freshly grated parmigiano-reggiano, and there was delicious soup! I also followed Marcella's simple method for crostini as a garnish. Lovely, simple, delicious (and nutritious)!