Spinach is one of the most nutritious vegetables, which contains high levels of vitamins A and C, folate, calcium, and iron. There are various food recipes that include spinach as an ingredient. It is mainly used for preparing soups, quiches, casseroles, burritos, sandwich, and sauces. Spinach soup can be used as a starter or as a light lunch. It is always better to go for fresh spinach for best results.