Heat your grill to medium-high heat.
In a small bowl, mix the Italian seasoning, sugar, dried chopped onions, salt, garlic powder, and onion powder together.
Keep your seasoning dry so that you can use the unused portion another day. If possible, place your seasonings mixture in an empty spice shaker bottle.
Next, on a cutting board, slice your zucchini lenghwise in 1/3 to 1/2 inch strips (or you might call them zucchini planks!)
Pour a bit of olive oil into a small bowl. Using a pastry brush, brush the zucchini with olive oil on both sides.
Sprinkle ONE side of the zucchini with a generous portion of the seasoning mixture.(I add the seasoning to the inner portion, not the green skin side as it doesn’t stick as well to the zucchini skin.) When your grill is hot, place your zucchini on the grill.
I place the zucchini plain side down and seasoning side up first.
Cook for 5 minutes. Then, flip each zucchini slice with tongs.
Then cook another 5 minutes. Make sure you close your grill lid, so that it can reach the proper temperature.
The zucchini should be tender-crisp with grill marks when it is ready.Serve immediately.