Grilled Zucchini and Summer Squash Salad

2 tablespoons grated orange rind
3/4 cup fresh orange juice (about 3 oranges)
1/2 cup fresh lime juice (about 3 limes)
3 tablespoons honey
2 teaspoons olive oil
1/2 teaspoon salt
1/4 teaspoon crushed red pepper
2 red onions
4 zucchini, each halved lengthwise (about 1 1/4 pounds)
4 yellow squash, each halved lengthwise (about 1 pound)
Cooking spray
3 tablespoons thinly sliced fresh basil

Preparation:

Combine first 7 ingredients in a large zip-top plastic bag. 

Peel onions, leaving root intact; cut each onion into 4 wedges. 

Add onion, zucchini, and yellow squash to bag. Seal and marinate in refrigerator 1 hour, turning bag occasionally.

Prepare grill.

Drain vegetables in a colander over a bowl, reserving marinade. 

Place vegetables on a grill rack coated with cooking spray, and grill for 8 minutes or until tender; turn and baste occasionally with 3/4 cup of the marinade. 

Place the vegetables on a serving platter; sprinkle with the basil. 

Serve the vegetables with the remaining marinade.