1. Combine grapefruit and lime juices, shallot, and honey in medium bowl. Whisking constantly, gradually add olive oil; add mint and chives and season to taste with salt and pepper. Set aside while cooking fish.

2. To serve, whisk vinaigrette to recombine; drizzle vinaigrette over fish fillets and serve immediately with grapefruit sections.

Makes about 1/2 cup