Ingredients

1 tablespoon plus 1 teaspoon coriander seeds 

1 teaspoon fennel seeds 

2 teaspoons mustard seeds 

2 green cardamom pods 

6 cloves garlic, coarsely chopped 

2 teaspoons coarse salt 

Zest and juice of 2 limes 

4 small chiles, coarsely chopped 

1 medium onion, coarsely chopped 

1/2 cup plain yogurt 

Preparation

Toast coriander seeds, fennel seeds, mustard seeds, and cardamom pods in a dry skillet over medium heat until they darken slightly and become fragrant, about 1 1/2 minutes. Grind to a fine powder in a spice grinder (or clean coffee grinder).

Transfer to a blender, along with garlic, salt, lime zest and juice, chiles, onion, and yogurt. Blend to form a smooth paste.

Transfer to a nonreactive dish. Refrigerate until ready to use, up to 3 days.