*If roasting your own tomatoes, pre-heat oven to 450 degrees. Place tomatoes upside down on a baking sheet and score and "x" on the bottom of both. Roast in the oven for 30-40 minutes. Let cool, peel away skin, and puree until smooth.
Adapted from: http://www.novicehousewife.com/2013/10/22/garam-
masala-tuesdays-slow-cooker-dal-makhani/