Heat 1/2 teaspoon oil in a large nonstick skillet over medium heat. Add ginger and garlic; cook 1 minute. Add pepper and onions; cook 1 minute. Stir in curry powder, curry paste, and cumin; cook 1 minute. Add soy sauce, sugar, 1/4 teaspoon salt, and coconut milk; bring to a simmer (do not boil). Remove from heat; stir in cilantro.
Brush fish with 1/2 teaspoon oil; sprinkle with 1/4 teaspoon salt. Place fish on a baking sheet coated with cooking spray. Broil 7 minutes or until fish flakes easily when tested with a fork. Serve fish with sauce, rice, and lime wedges.
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