Heat 1 tbsp oil in a pan on medium flame. Add cumin seeds and let them crackle.
1 Tbsp Oil, 1/2 Tsp Cumin Seeds
Add ginger, garlic, red chilies, urad dal, and chana dal. Sauté until the dal starts changing color.
5 g Ginger, 15 g Garlic, 3 Red Chilies, 1 Tbsp Urad Dal, 1 Tbsp Chana Dal
Add red onion and sauté for 2 minutes.
1 Cup Red Onion
Add tomatoes, turmeric, and salt. Mix, cover, and cook on medium heat for 10 minutes.
2 Cups Tomatoes, 1/2 Tsp Turmeric, 3/4 Tsp Salt
Turn off the flame, uncover, and let cool for 10 to 15 minutes.
Meanwhile, heat 1 tbsp oil in a small pan on medium-high heat. Crackle mustard seeds, then add urad dal, curry leaves, and hing.
1 Tbsp Oil, 1 Tsp Mustard Seeds, 1 Tsp Urad Dal, 8-10 Curry Leaves, 1/2 Tsp Hing
Blend the cooled chutney until smooth.
Pour the tadka over the chutney and mix well.