Ingredients

  • 1 lb zucchini (about 2 to 3 medium), coarsely chopped
  • 3/4 cup loosely packed fresh basil leaves
  • 1 medium shallot, coarsely chopped
  • 2 garlic cloves, peeled
  • 1 1/2 cups water
  • 3/4 teaspoon salt
  • 1/4 teaspoon black pepper
  • 1/3 cup extra-virgin olive oil
  • 4 lb cultivated mussels, scrubbed and beards removed
  • Garnish: chopped fresh basil

Method

  • Puree zucchini, basil, shallot, garlic, water, salt, pepper, and oil (in batches if necessary) in a blender until smooth, 1 to 2 minutes per batch.
  • Transfer zucchini puree to a wide 6- to 7-quart heavy pot and add mussels. Bring to a simmer, uncovered, over moderately high heat, then cover and cook, stirring occasionally, until mussels just open wide (check frequently after 5 minutes and discard any mussels that remain unopened after 8 minutes).