South Indian Onion Sambar with Lentils

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A comforting Tamil Nadu-style sambar where pearl onions are simmered in a tangy tamarind-lentil broth infused with freshly toasted sambar spice. Served piping hot with steamed rice, idli, or dosa, this humble stew is the everyday soul of South Indian home cooking. The sweet bite of shallots balances tart tamarind and earthy lentils in every spoonful.

Nutrition Facts

Per serving (estimated)

• 285 kcalCalories
• 8 gFat
• 1.2 gSaturated Fat
• 40 gCarbs
• 9 gFiber
• 6 gSugar
• 14 gProtein
• 580 mgSodium
• 720 mgPotassium
• 85 mgCalcium
• 4.5 mgIron
• 18 mgVitamin C
• 130 mcgVitamin A

Ingredients

For the lentils

• 1 cup toor dal (split pigeon peas), rinsed well
• 2.5 cups water
• 1/4 tsp turmeric powder
• 1/2 tsp salt

For the sambar base

• 2 cups pearl onions (small shallots), peeled
• 1 medium tomato, finely chopped
• 1.5 tbsp tamarind pulp (soaked from a small lemon-sized ball)
• 2 tbsp sambar powder
• 1 tsp red chili powder
• 1 tsp jaggery or brown sugar
• 2 cups water
• Salt to taste

For the tempering (tadka)

• 2 tbsp sesame (gingelly) oil
• 1 tsp mustard seeds
• 1 tsp cumin seeds
• 1/4 tsp fenugreek seeds
• 2 dried red chilies, broken
• 1 sprig fresh curry leaves
• Pinch of asafoetida (hing)

For garnish

• 2 tbsp fresh coriander leaves, chopped
• 1 tbsp ghee (optional)

Directions

1. Pressure cook the rinsed toor dal with 2.5 cups water, turmeric, and 1/2 tsp salt for 3 to 4 whistles (about 10 minutes) until completely soft and mushy, then mash smoothly and set aside.
2. Soak tamarind in 1 cup warm water for 10 minutes, squeeze well, and strain to extract a thick tamarind pulp; discard the fibers.
3. Heat sesame oil in a heavy-bottomed pot over medium heat. Add mustard seeds and let them splutter, then add cumin, fenugreek, broken red chilies, curry leaves, and asafoetida; sizzle for 20 seconds.
4. Add the peeled pearl onions and sauté for 4 to 5 minutes until their edges turn translucent. Stir in the chopped tomato and cook 2 to 3 minutes until soft and pulpy.
5. Pour in the tamarind pulp, then add sambar powder, red chili powder, jaggery, and 2 cups water. Bring to a rolling boil and simmer 8 to 10 minutes until the raw tamarind aroma disappears and the onions are fork-tender.
6. Stir the mashed dal into the pot along with salt to taste. Thin with a splash of water if needed for a pourable but not watery consistency, then simmer 6 to 8 minutes so the flavors meld and the sambar thickens slightly.
7. Finish with chopped coriander and a drizzle of ghee if using. Give one final stir and remove from heat.
8. Serve hot with steamed rice, idli, dosa, or uttapam. The sambar should taste balanced between sour, spicy, and gently sweet with soft, juicy onions throughout.

Cook’s Notes

• Use small pearl onions (madras shallots) for authentic sweetness and texture; if unavailable, quarter a regular yellow onion as a substitute.
• Sambar develops deeper flavor overnight, so consider making it a day ahead and gently reheating before serving.
• Add tamarind only after the dal is fully cooked and mashed, as adding it during pressure cooking can toughen the lentils.
• Roast your own sambar powder from dried coriander, red chilies, chana dal, and pepper for a far more aromatic result than most store blends.
• Balance the tamarind with a pinch of jaggery; the subtle sweetness rounds the sour edge and gives sambar its signature depth.

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