Or, you can sprinkle a little bit of onion powder or garlic powder on top of the zucchini slices before cooking. (lowcarbsosimple.com)
Add a little bit of onion powder, garlic powder, sea salt, and black pepper and then shake the container to mix all ingredients well. (truthaboutabs.com)
Again, it won't change the sauce dramatically if you skip this step, I just prefer not to see large bits of onion and garlic. (kitchenistadiaries.com)