Zucchini and Saffron Vichyssoise with Scallops

Preparation

1. Step 1

   Thinly julienne zucchini lengthwise with slicer, working around core, into 1/4-inch-thick ribbons. Cut zucchini cores into 1/2-inch pieces.

   Step 2

   Peel potatoes and cut into 1/2-inch pieces. Cook onion in butter in a 5-quart heavy pot over moderate heat, stirring occasionally, until softened, about 10 minutes. Add potatoes, garlic, and saffron and cook, stirring, 1 minute. Add broth, bay leaf, and thyme and simmer, uncovered, until potatoes are tender, about 20 minutes. Add chopped zucchini cores and simmer, uncovered, until zucchini is very tender, about 8 minutes.

   Step 3

   Purée soup in batches in a blender until very smooth (use caution when blending hot liquids) and pour through a fine sieve into a bowl. Stir in cream, lemon juice, salt, and pepper, then cool to room temperature, uncovered. Chill soup, covered, until cold, at least 4 hours and up to 2 days.

   Step 4

   While soup is chilling, cook julienned zucchini in boiling salted water until crisp-tender, about 30 seconds, then drain and transfer to a bowl of ice and cold water. Drain and pat dry with paper towels. Season with salt and pepper and chill, covered.

   Step 5

   Before serving soup, cut each scallop horizontally into 3 rounds and pat dry. Heat oil in a large nonstick skillet over high heat until hot but not smoking, then sear scallops until golden brown, 20 to 30 seconds on each side, and season with salt.

   Step 6

   Serve soup with zucchini mounded in center, topped with scallop rounds.