Prep the clams: Steam frozen clams in a pot with a splash of water or broth until they open (6–8 min).
Discard any unopened ones. Remove meat from shells and strain the clam broth through a fine sieve.
Cook the base: Heat ghee. Add mustard seeds and let them pop. Add onion, garlic, ginger, and chili. Sauté until soft. Stir in turmeric, coriander, and garam masala. Toast for 30 seconds. Add diced potato and carrot. Mix well.
Simmer: Pour in broth + strained clam liquid. Simmer for 10–12 minutes, until vegetables are soft. Add coconut milk, bring to a gentle boil.
Finish with clams: Stir in shelled clams. Let warm through for 2–3 minutes (don’t boil). Season with salt, pepper, and a splash of lemon juice or tamarind.
Serve: Top with fresh cilantro and optional toasted, slightly crushed cumin seeds or a drizzle of chili oil. To toast cumin seeds, dry-roast them in a hot pan for 1–2 minutes until fragrant, then lightly crush. Serve in a hollowed-out, oven-crisped bread bowl if you like – and scoop the bread as you go.