Heat 1 tablespoon oil in a wide pan on medium. Add garlic and the broken red chili. Stir 20 to 30 seconds until the garlic smells cooked and stays pale gold.
Add the chopped tomatoes and salt. Cook 10 to 12 minutes, stirring, until the tomatoes collapse and you see oil at the edges. The raw smell should be gone.
Stir in jaggery and roasted cumin powder. Cook 1 minute. The mix should look thick, not soupy.
Cool 5 minutes. Blend to a coarse puree. You want body, not a thin soup. Taste for salt and jaggery.
Tadka
Heat 1 teaspoon oil in a small pan. Add mustard seeds. When they pop, add urad dal.
Stir until the dal turns pale gold, about 20 seconds. Add curry leaves if using.
Pour over the blended chutney. Stir. Serve warm or at room temperature.
Notes
If the tomatoes are very juicy, cook uncovered the whole time. Do not cover or they steam and stay watery.For a brighter red, use Kashmiri chili powder (1/4 teaspoon) with the cumin instead of a second dry chili.I once added the jaggery with the raw tomatoes. It stuck and browned on the bottom. Add sweeteners after the tomatoes have given up their water.Store in an airtight container in the refrigerator for up to 4 days. The flavor settles on day two.Reheat gently or serve cold. I do not freeze this. The texture goes dull.