Active time: 2 hr Start to finish: 3 1/2 hr (includes making stock)
Cooks' notes:
• Lobster can be cooked and stock made 2 days ahead and chilled separately, covered. • Carrots, haricots verts, and peas can be blanched 1 day ahead and chilled in a sealed plastic bag lined with paper towels. • Sauce can be made 1 day ahead and cooled, uncovered, then chilled, covered. Bring to a simmer before proceeding.