In a large ziplock bag place olive oil, Italian seasoning, garlic, salt, and pepper. Shake to mix together marinade ingredients.
Cut zucchini or squash in long spears and add to marinade. Shake bag to combine. Set aside at room temperature for 15 minutes, up to 1 hour.
Preheat grill to medium high heat. Oil grate and grill zucchini about 3-5 minutes per side or until charred and cooked. Remove grilled zucchini to a baking sheet. Immediately drizzle fresh lemon juice over and sprinkle hot zucchini with parmesan.
DID YOU MAKE THIS RECIPE?? DON'T FORGET TO LEAVE FEEDBACK AND/OR CLICK A STAR RATING ON THE RECIPE CARD!
How Long to Grill Zucchini or Squash
Three minutes per side will give it a charred exterior, but still crisp inside. If you prefer more tender grilled zucchini, leave it on for about 5-6 minutes per side.
Grilled Zucchini Slices
Trim off the stems and slice each squash horizontally, into 1/2 inch thick circles. You can still place the slices on the grill, but turn carefully so they don't fall through the grate. Alternatively, use a grill basket placed on the grill or a grill pan (affiliate links) on your stove.
Make Lemon Parmesan Zucchini recipe in the Oven
If you don't feel like turning on the grill for this zucchini recipe, you also have the option or roasting it in the oven.
Preheat oven to 425ºF. Spray a baking sheet with cooking spray.
Lay the zucchini or squash in a single layer on a sheet pan, with space between each spear so the heat can circulate around the veggies.
Roast for about 15 minutes, flipping halfway through. Remove from oven, squeeze on lemon juice and sprinkle with fresh parmesan.