Yogurt Curry or Moor Kuzhambu is the most soothing curry, specially in summer. I like to make this curry even in freezy winter too :)
It can be prepared with or without vegetables(okra, snake gourd or bottle gourd...etc)

Yogurt - 2 cups
Channa dhal- handful
Yellow lentils - handful
Garlic - 3
Ginger - 2 spoons
Cumin - 1tbsp
Grated coconut - 2tbsp
Chopped Onions - handful
Shallots - 6
Mustard seeds - 1tbsp
Red Chilly - 1
Pepper - 1 tbsp
Green chillies - 2
Turmeric - 1 tsp

Soak the channa dhal and yellow lentil in hot water for an hour.
Grind the lentils, garlic, grated coconut, chopped onions, chillies, whole peppers to fine paste.
Heat oil in a pan, add cumin, mustard seeds, red chilly, shallots fry till the onion turns golden brown.
Add any vegetable and fry till it gets cooked.
Mix the ground paste and add turmeric and salt, fry till the raw smell subsides.
Add the Sour yogurt and remove from heat after one minute.
Serve with Rice and spicy potato fry.