Authentic South Indian Rasam (Spicy Lentil Soup)

Soups

October 30, 2026

A Taste of Tradition: The Soul-Warming Temple Rasam – vegetarian recipe

Temple rasam is a taste of tradition in a bowl — a thin, restorative broth of tomatoes, lentils, ginger, and black pepper, sharpened with tamarind and finished with sizzling mustard seeds and curry leaves. It's the dish you want when you're cold or simply in need of something honest. It drinks like a broth and comforts like a blanket.

A Taste of Tradition: The Soul-Warming Temple Rasam

In India, food is a sacred offering, a thread connecting the mortal to the divine. Step into any South Indian temple, and you’ll be greeted by the heavenly aroma of its kitchen. One of the most cherished offerings, or *prasadam*, is this very rasam. It’s more than just a soup; it’s a soul-warming elixir. This thin, fiery, and tangy lentil broth is a symphony of flavors that brightens even the dullest of days. Each spoonful is a taste of tradition, a comforting hug in a bowl that I’m so excited to share with you.

Ingredients

• Serves 4
• 1 cup / 200g (7.1 oz) red lentils (masoor dal)
• 1 tsp / 5g (0.18 oz) cumin seeds
• 1.5-inch / 4cm piece ginger, roughly chopped
• 3 cloves garlic, peeled and chopped
• 1 Indian green chile
• 2 tbsp / 30ml canola oil or other neutral oil
• 15 fresh curry leaves
• 1 tsp / 5g mustard seeds
• ¾ tsp / 2g (0.07 oz) ground black pepper
• 4 large ripe tomatoes, chopped
• 1.5 tsp / 7.5g (0.26 oz) tamarind paste
• 1.25 tsp / 7g (0.25 oz) salt, or to taste
• 3.25 cups / 770ml hot water

Instructions

1. Rinse the red lentils in cold water until the water runs clear. Cover with fresh water and set aside.
2. Using a mortar and pestle, roughly grind the cumin seeds and set them aside. Then, grind the ginger, garlic, and green chile into a fine paste. Alternatively, use a small blender.
3. Heat the oil in a lidded saucepan over medium heat. Once hot, add the curry leaves, mustard seeds, ground cumin, and black pepper.
4. When the mustard seeds pop and the curry leaves crackle, carefully remove a few leaves for garnish. Add the ginger-garlic-chile paste to the pan and sauté for 3 minutes until fragrant.
5. Stir in the chopped tomatoes and cook for about 4-5 minutes, until they soften and become jammy.
6. Drain the soaked lentils and add them to the pan along with the tamarind paste and 3¼ cups (770ml / 26 fl oz) of hot water.
7. Bring to a boil, then reduce the heat, cover, and simmer for 20-25 minutes until the lentils are completely soft and cooked through.
8. Stir in the salt, tasting and adjusting as needed.
9. The final rasam should be a thin soup, both hot and sour. Ladle into bowls, garnish with the reserved crispy curry leaves, and serve immediately. Enjoy it on its own or with a side of steamed basmati rice.

Nutritional Information

• (per serving)
• Calories: 250 kcal | Protein: 12g | Carbohydrates: 35g | Fat: 8g | Fiber: 10g | Iron: 4mg

Pro Tips

• for the Perfect Rasam
• Tamarind paste varies in strength by brand. Start with a small amount and add more gradually, tasting as you go, to achieve your desired level of sourness.
• For a deeper, nuttier flavor, dry roast the cumin seeds in a pan for a minute until fragrant before grinding them.
• For a smoother consistency, you can lightly pulse the finished rasam with an immersion blender for a few seconds. Be careful not to blend it into a thick puree.

FAQ

Q: Is this temple rasam a good source of vegetarian protein
A: Yes, this rasam is an excellent source of plant-based protein. Each serving contains approximately 12g (0.42 oz) of protein, primarily from the red lentils (masoor dal), making it a nutritious and satisfying vegetarian meal.

Q: Can I use a different type of lentil for this recipe
A: While this recipe is designed for quick-cooking red lentils (masoor dal), you can substitute them with yellow split pigeon peas (toor dal). Be aware that you may need to increase the simmering time to ensure the toor dal becomes completely soft and cooked through.

Q: How should I store leftover vegetarian rasam
A: Store any leftover rasam in an airtight container in the refrigerator for up to 3 days. Reheat it gently on the stovetop over low heat. The rasam may thicken upon cooling, so you can add a splash of hot water when reheating to achieve your desired consistency.

Q: How can I make this rasam less spicy
A: To reduce the heat level, you can use half of the Indian green chile or remove its seeds before grinding. You can also slightly decrease the amount of ground black pepper to suit your taste. The rasam will still be aromatic and flavorful from the ginger, garlic, and other spices.

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A Taste of Tradition: The Soul-Warming Temple Rasam – vegetarian recipe
Stav Kogan

A Taste of Tradition: The Soul-Warming Temple Rasam

This soul-warming elixir is a thin, fiery, and tangy lentil broth, a symphony of flavors that brightens even the dullest of days. Each spoonful is a taste of tradition, a comforting hug in a bowl.
Prep Time 15 minutes
Cook Time 35 minutes
Total Time 50 minutes
Servings: 4 cup
Calories: 250

Ingredients
  

  • 1 cup (200 g / 7.1 oz) red lentils (masoor dal)
  • 1 tsp (5 g / 0.18 oz) cumin seeds
  • 1.5-inch / 4cm piece ginger, roughly chopped
  • 3 cloves garlic, peeled and chopped
  • 1 Indian green chile
  • 2 tbsp (30 ml) canola oil or other neutral oil
  • 15 fresh curry leaves
  • 1 tsp (5 g / 0.18 oz) mustard seeds
  • ¾ tsp (2 g / 0.07 oz) ground black pepper
  • 4 large ripe tomatoes, chopped
  • 1.5 tsp (7.5 g / 0.26 oz) tamarind paste
  • 1.25 tsp (7 g / 0.25 oz) salt, or to taste
  • 3.25 cups (770 ml) hot water
  • for the Perfect Rasam
  • Tamarind paste varies in strength by brand. Start with a small amount and add more gradually, tasting as you go, to achieve your desired level of sourness.
  • For a deeper, nuttier flavor, dry roast the cumin seeds in a pan for a minute until fragrant before grinding them.
  • For a smoother consistency, you can lightly pulse the finished rasam with an immersion blender for a few seconds. Be careful not to blend it into a thick puree.

Method
 

  1. Rinse the red lentils in cold water until the water runs clear.
  2. Cover with fresh water and set aside.
  3. Using a mortar and pestle, roughly grind the cumin seeds and set them aside.
  4. Then, grind the ginger, garlic, and green chile into a fine paste. Alternatively, use a small blender.
  5. Heat the oil in a lidded saucepan over medium heat.
  6. Once hot, add the curry leaves, mustard seeds, ground cumin, and black pepper.
  7. When the mustard seeds pop and the curry leaves crackle, carefully remove a few leaves for garnish.
  8. Add the ginger-garlic-chile paste to the pan and sauté for 3 minutes until fragrant.
  9. Stir in the chopped tomatoes and cook for about 4-5 minutes, until they soften and become jammy.
  10. Drain the soaked lentils and add them to the pan along with the tamarind paste and 3¼ cups (770ml / 26 fl oz) of hot water.
  11. Bring to a boil, then reduce the heat, cover, and simmer for 20-25 minutes until the lentils are completely soft and cooked through.
  12. Stir in the salt, tasting and adjusting as needed.
  13. The final rasam should be a thin soup, both hot and sour. Ladle into bowls, garnish with the reserved crispy curry leaves, and serve immediately.
  14. Enjoy it on its own or with a side of steamed basmati rice.

Nutrition

Calories: 250kcalCarbohydrates: 35gProtein: 12gFat: 8g

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