Wash, dry and remove the ends of your zucchini and yellow squash; then cut into rounds about one inch thick. You should get 6 to 7 rounds from each zucchini and squash. Peel the papery layer from the ½ sweet onion and chop into quarters, break each quarter into 2 or 3 layers. Mix the marinade by adding the ACV, mustard and cooking oil into a small jar and whisking together.

Add all the chopped veggies into the bowl of a vacuum powered Instant Marinater, pour marinade over the veggies and stir together until everything is evenly coated. Place on the top use the air pump to remove the air.

Let the veggies marinate for 15-20 minutes then skewer alternating zucchini, yellow squash, onion; on heavy duty metal skewers. Grill on medium/high with the lid open 10 minutes, then flip over and grill for 8 minutes on the other side.

Enjoy!