Tandoori masala is an Indian spice mix consisting of a variety of spices, including cumin, coriander, cayenne pepper and/or red food coloring to give it a red color. It is used to marinate the meats, seafood, paneer cooked in tandoor oven.
If you don't have ingredients you can use a combination of 2/3 paprika to 1/3 cayenne with and a pinch of cinnamon.