Trim ends off zucchini and cut into quarters lengthwise.

Take a spoon and hold upside down, run along the core to remove the seeds from center.

Spread zucchini cut-side up on a baking sheet lined with paper towels.

Sprinkle with half a teaspoon of salt and let sit for 10 minutes. Blot with paper towel to dry.

Preheat grill to medium.

Combine all remaining ingredients except for lemon zest and toss zucchini in mixture to coat.

Set zucchini on grill to cook, flipping occasionally until cooked but not too soft, about eight minutes.

Remove from grill and sprinkle with lemon zest and any extra vinaigrette.