1. To prepare sauce, heat a small saucepan over medium-high heat. Add 1 teaspoon oil to pan; swirl to coat. Add onion, ginger, and garlic; sauté 3 minutes, stirring frequently. Add nectar and pepper; bring to a boil. Cook 10 minutes or until reduced to 3/4 cup. Remove from heat; let stand 10 minutes. Place mixture in a blender; process until smooth. Stir in juice and 1/8 teaspoon salt. Cool.
2. Peel and devein shrimp, leaving tails intact; discard shells.
3. Place coconut in a food processor; pulse 6 times or until finely chopped. Add panko; pulse to combine. Place coconut mixture in a shallow dish. Place cornstarch in a shallow dish. Place egg whites in a shallow dish. Sprinkle shrimp evenly with 1/2 teaspoon salt. Working with 1 shrimp at a time, dredge shrimp in cornstarch, shaking off excess. Dip in egg whites; dredge in coconut mixture.
4. Heat a large nonstick skillet over medium-high heat. Add 2 teaspoons canola oil to pan; swirl to coat. Add 7 shrimp to pan; coat tops of shrimp with cooking spray. Cook shrimp 2 1/2 minutes on each side or until done. Repeat procedure 3 times with remaining oil and shrimp.