Shrimp with Orange Dust - fresh basil

Method

• Blanch 3/4 cup basil in a 2-quart saucepan of boiling salted water 2 minutes, then drain in a sieve and plunge into a bowl of ice water to stop cooking.
• Drain basil again and press out excess liquid.
• Puree basil with grapeseed oil in a blender 2 minutes.
• Pour mixture into an airtight container and chill 8 to 12 hours.
• Pour through a very fine sieve into a small bowl (do not press on solids).
• Squeeze juice from 1 lemon half into a large bowl of water, then drop same half into water.
• Keep stem attached and, at opposite end, cut off top inch of 1 artichoke with a serrated knife.
• Bend back outer leaves until they snap off close to base, then discard several more layers in same manner until you reach pale yellow leaves with pale green tips.
• Cut remaining leaves flush with top of artichoke bottom using a sharp knife, then trim dark green fibrous parts from base and sides of artichoke.
• Rub cut surfaces with remaining lemon half.
• Cut 1/4 inch from stem to expose inner core.
• Trim sides of stem (still attached) down to pale inner core.
• Rub cut surfaces with same lemon half.
• Cut artichoke into 4 wedges, then cut out any remaining purple leaves and fuzzy choke and drop artichoke wedges into lemon water.
• Prepare remaining 3 artichokes in same manner.
• Cook onion in olive oil in a 12-inch heavy skillet over moderate heat, stirring occasionally, until softened, about 5 minutes.
• Drain artichokes and pat dry with paper towels.
• Arrange artichokes over onion, then add wine and simmer, covered, until artichokes are tender, 30 to 40 minutes.
• Transfer mixture with a slotted spoon to a large bowl and keep warm, covered.
• Pat shrimp dry and sprinkle with salt, cayenne, and 1 tablespoon orange dust.
• Heat butter in cleaned skillet over moderately high heat until foam subsides, then cook shrimp until just cooked through, about 2 minutes on each side.
• Toss arugula, remaining 1/2 cup micro-basil, lemon juice, and remaining 2 teaspoons orange dust with artichoke mixture and season with salt.
• Divide mixture among 4 plates and arrange shrimp around salad.
• Drizzle each serving with some basil oil and sprinkle with additional orange dust.