A smart combination of the right ingredients is essential to ensure the maximum uptake of iron from a recipe. In this wholesome whole wheat spaghetti in spinach sauce, we have done away with cheese because calcium hinders the absorption of iron. Iron-rich red pumpkin is used in the place of milk to thicken the sauce. This recipe also has crunchy walnuts, another good source of iron and an excellent source of omega-3-fatty acids.