Instructions

  1. Cut broccoli and cauliflower into florets, discarding outer leaves and stems.
  2. You should have about 8 cups broccoli florets and 4 cups cauliflower.
  3. In a large pot, bring 8 cups of lightly salted water to a boil.
  4. Add cauliflower; cook 2 minutes.
  5. Add broccoli; cook an additional 6 minutes or until vegetables are crisp tender. Drain.
  6. While vegetables are cooking, make Cheese Sauce:
  7. In a medium-size saucepan, melt butter over medium heat. Whisk in flour and cook 1 minute.
  8. Gradually whisk in the milk; continue to whisk until smooth. Bring to a boil.
  9. Remove from heat and stir in cheese, mustard, chiles, hot-pepper sauce and salt.
  10. Stir until smooth. If a thinner sauce is desired, stir in a few more tablespoons of milk.
  11. To serve, place vegetables in large serving dish and pour cheese sauce over the top. Serve immediately.
  12. Do Ahead: Cook vegetables, rinse under cold water to stop cooking. Drain and refrigerate. Prepare sauce; let cool, then cover and refrigerate up to a day ahead.
  13. To serve, uncover; remove from refrigerator and let stand 30 minutes.
  14. Reheat separately in microwave oven (adding more milk to sauce as needed).