1-1/2 cups thinly sliced scallion, white and green parts
2 tsp. grated fresh ginger
1/2 tsp. sugar
1/4 tsp. salt
1 tsp. grated orange zest
Freshly ground pepper, preferably white, to taste
4 (4-oz.) pieces tilapia or other mild, flaky white fish
Preheat the broiler.
Heat oil in a small skillet over medium heat. Mix in scallions to coat them with oil. Add ginger, sugar and salt. Cook, stirring until sugar dissolves and scallions are tender but still bright green, 3-4 minutes. Off the heat, mix in the zest. Season sauce generously with pepper. Set skillet aside so it keeps warm while the fish cooks.
Arrange fish on baking sheet and coat with cooking spray. Season fish lightly with salt and ground pepper. Broil until fish is opaque in the center at the thickest point, about 6 minutes. Divide fish among four dinner plates. Top each piece with one-fourth of the sauce. Serve immediately.