Cut zucchini and squash lengthwise at about ¼-inch thickness.

Cut sides off of your red peppers and slice your onion into rings (do not pull rings apart).

Using a pastry or grilling brush, coat both sides of veggies with olive oil.

Combine cumin, black pepper and salt in a small bowl and mix well.

Sprinkle the spice mixture on all sides of the veggies.

Place onto your hot grill pan and cook for 2–3 minutes each side.

Cut veggies into chunks and combine in serving bowl.