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Tomato Pepper Rasam (Thakkali Rasam)

A light, tangy South Indian-style soup with tomatoes, black pepper, and tamarind—simple, warming and full of flavor.
Prep Time10 minutes
Cook Time30 minutes
Course: Main Course, snacks
Cuisine: Indian
Servings: 4
Calories: 105kcal

Ingredients

For the soup base

  • 15 ml ghee or oil
  • 3 g mustard seeds 1 teaspoon
  • 3 g cumin seeds 1 teaspoon
  • 2 g dried red chili 1 piece
  • 1 g asafoetida hing (a pinch)
  • 8–10 g fresh curry leaves 8–10 leaves
  • 5 g ground black pepper 1 teaspoon
  • 300 g tomatoes finely chopped (2 medium)
  • 10 g green chilies chopped (1–2 pieces)
  • 15 g fresh ginger grated (1 inch piece)
  • 80 g red lentils washed, masoor dal (¼ cup)
  • 40 ml tamarind liquid 3 tablespoons
  • 3 g turmeric powder 1 teaspoon
  • 1,000 ml water
  • Salt to taste

To serve

  • 8 g fresh cilantro chopped (2 tablespoons)

Instructions

  • Toast the spices: Heat the ghee or oil in a large pot over medium heat. Add mustard seeds, cumin seeds, and the dried red chili. Stir and cook for about 30 seconds, until the mustard seeds start to pop.
  • Add aromatics: Stir in the ground black pepper, asafoetida, and curry leaves. Let everything toast briefly, just until fragrant.
  • Sauté vegetables: Add the chopped tomatoes, green chilies, and ginger. Cook for 3–4 minutes, stirring occasionally, until the tomatoes begin to break down.
  • Simmer with lentils: Add the rinsed red lentils, tamarind liquid, turmeric, salt, and water. Stir well and bring the mixture to a gentle boil.
  • Cook until soft: Reduce the heat and let it simmer uncovered for 20–25 minutes, or until the lentils are soft and the soup has thickened slightly.
  • Taste and serve: Adjust salt if needed. Serve hot, topped with fresh chopped cilantro. Enjoy as a light soup or over rice.

Notes

  • Tamarind: If you don’t have tamarind liquid or concentrate, you can use a splash of lemon juice at the end for acidity (not traditional, but works in a pinch).
  • Red lentils: They add body and mild creaminess without making the rasam thick. You can skip them for a thinner, broth-like version.
  • Spice level: Adjust the black pepper and green chilies to your heat preference. You can deseed the chilies for less heat.
  • Asafoetida: Optional, but adds a savory depth—use a tiny pinch, especially if you're skipping onion and garlic.
  • Curry leaves: Dried ones work fine, but fresh leaves give a much stronger aroma if you have access to them.

Recipe Twist Ideas

  • Garlic version: Add 2–3 cloves of minced garlic with the ginger for a more robust flavor.
  • Rasam rice bowl: Serve over a bowl of rice with a spoonful of ghee, some fried papad, or a side of stir-fried greens.
  • Clear version: Strain the rasam after cooking for a more broth-like consistency—great as a sipping soup.
  • Add vegetables: Stir in spinach, chopped okra, or even small cubes of carrots or pumpkin for extra nutrition.
  • Spiced tempering on top: For a finishing touch, do a second tempering with ghee, mustard seeds, and crushed garlic right before serving and pour it over the rasam.

Nutrition

Calories: 105kcal | Carbohydrates: 13g | Protein: 5g | Fat: 4g | Saturated Fat: 1g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 1g | Trans Fat: 0.02g | Cholesterol: 1mg | Sodium: 154mg | Potassium: 428mg | Fiber: 6g | Sugar: 4g | Vitamin A: 1135IU | Vitamin C: 70mg | Calcium: 40mg | Iron: 2mg