Grill Perfect Zucchini Cut zucchini into equal slices. Combine 1/2 c favorite vinaigrette salad dressing w/ 1 tsp garlic powder & 1-2 tsp dried herbs of choice (oregano, basik. thyme, rosemary). Put slices and marinade into Ziploc bag for 4 hours or more. Grill over med-high ~6 min and flip ~4 more min or until starts to soften. Season w/ salt & pepper and serve.