Instructions

  1. Discard tough lower third of broccoli stem.
  2. Peel remaining stem and finely chop.
  3. Cut remaining broccoli into very small (1-inch) florets.
  4. Cook florets in a large pot of boiling salted water until just tender, 2 to 3 minutes.
  5. Transfer with a slotted spoon to a bowl of ice water to stop cooking, then drain, reserve 3 cups cooking water for chowder.
  6. Peel potato and cut into 1/2-inch cubes.
  7. Cook potato, onion, bell pepper, broccoli stems, and garlic in butter in a 3- to 4-quart heavy pot over moderate heat, stirring occasionally, until onion is softened, 8 to 10 minutes.
  8. Add cumin, salt, pepper, and mustard and cook, stirring, 1 minute.
  9. Add flour and cook, stirring, 2 minutes.
  10. Add reserved cooking water and simmer (partially covered), stirring occasionally, until potatoes are tender, about 10 minutes.
  11. Stir in cream and cheese and cook, stirring, until cheese is melted; season with salt and pepper.
  12. Purée about 2 cups of chowder in a blender until smooth (use caution when blending hot liquids) and return to pot.
  13. Add florets and cook over moderate heat, stirring occasionally, until heated through, about 2 minutes.