Palak paneer and Saag paneer are both popular dishes in Indian cuisine that feature paneer cheese and greens. The main difference between the two is the type of greens used. Palak paneer is made with spinach, which is known as "palak" in Hindi. Saag paneer, on the other hand, is made with a mixture of different greens, including spinach, mustard greens, and sometimes even fenugreek leaves (methi). The word "saag" actually refers to any dish made with leafy greens.