How to Make It
To prepare curry paste, combine first 11 ingredients in a mortar or bowl; grind with a pestle until mixture forms a smooth paste.
To prepare mussels, heat a large Dutch oven over medium-high heat. Add oil; swirl to coat. Add cauliflower; sauté 3 minutes or until lightly browned. Stir in curry paste, stock, and milk; bring to a boil. Add mussels; cover, and simmer 5 minutes or until mussels open. Discard any unopened shells. Stir in lime juice and herbs. Spoon into shallow bowls; serve immediately.