Saag, also spelled sag or saga, is an Indian subcontinental leafy vegetable dish eaten with bread such as roti or naan, or in some regions with rice. Saag can be made from spinach, mustard greens, collard greens, basella, finely chopped broccoli or other greens, along with added spices and sometimes other ingredients such as chhena.

Spinach is a leafy green flowering plant native to central and Western Asia. It is of the order Caryophyllales, family Amaranthaceae, subfamily Chenopodioideae. Its leaves are a common edible vegetable consumed either fresh, or after storage using preservation techniques by canning, freezing, or dehydration. It may be eaten cooked or raw, and the taste differs considerably; the high oxalate content may be reduced by steaming.