This recipe provides a simple way to sauté spinach with garlic and lemon juice. The key steps are to cook sliced garlic in olive oil until lightly browned, then add spinach and cook until wilted. The spinach is then tossed with lemon juice, salt, and red pepper flakes before serving. Using mature or baby spinach is optional as they can be used interchangeably in this simple recipe that highlights the flavor of spinach.