Stir orange juice, honey, and a pinch of salt and reduce over medium-high heat.
Continue to stir as juice bubbles. Remove from heat when the juice mixture is about half the volume and thick enough to coat your spoon.
Preheat BBQ on high heat.
Slice zucchini(s) in lengthwise strips, approximately 1/4-inch thick. Brush 1/3 of the orange glaze on one side of zucchini just before grilling. If the glaze is too thick, mix in enough water that it will easily brush onto the zucchini.
Reduce BBQ to medium burner setting.
Grill zucchini slices with the glaze-side up until the zucchini starts to soften and the bottom side starts to develop grill marks.
Turn zucchini slices, and brush the already-grilled side with another third of the glaze.
Remove from BBQ when the second side is grilled. Brush on the remaining orange glaze and top with a light sprinkle of salt.
Tip: be sure that your grill is clean before cooking the zucchinis. I like to use a cut onion rubbed on the grill to help keep food from sticking to the grate