Then in a blender, take the garlic and dry chilies, pulse till you get a coarse mix.
Then, add the tomatoes and blend to a smooth paste.
Heat a nonstick pan with sesame oil. Add mustard seeds, Urad dal, curry leaves. When the mustard splutters, add the blended paste.
Cook on high for 5 mins, then simmer with lid covered till the oil comes out.
The chutney has to really get cooked well as the ingredients are added raw. You will know when it's done by seeing the oil oozing out.
Notes
Reduce the garlic if you don't like so many.
Since the sesame oil is considered good for health, there is no harm in adding 3 tsp. Also, the shelf life will be more if more oil is added.