Heat the oil in a saucepan. The oil should be moderately hot. Add the cumin seeds as they crack add besan, and fenugreek seeds. Stir for about one minute, besan will become aromatic and will be light golden brown.
Next add tomato, coriander, red chili powder, and turmeric.
Stir-fry spice mix until spice mix starts leaving the oil. It should take about 2 minutes.
Add potatoes, spinach, and 1/2 cup of water, cover the pan. Let it cook over medium heat. The potatoes should be very tender but not mushy and should be covered with spinach.