Drizzle with 1 tablespoon oil, sprinkle with orange peel, and pour juice over; turn to coat.
Melt butter with 1 tablespoon oil in large nonstick ovenproof skillet over high heat.
Remove fish from marinade, reserving marinade; sprinkle with salt and pepper. Cook fish until light brown, about 3 minutes. Turn fish over; add shallot. Cook 1 minute. Stir saffron into reserved marinade; pour marinade over fish.
Add olives and half of orange segments.
Transfer skillet to oven; roast fish until cooked through, about 6 minutes.
Transfer fish to platter; top with remaining orange segments. Spoon sauce with oranges and olives around fish.
Sprinkle with basil and chives and serve.
Nutrition Data
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