Preheat oven to 400 degrees. Then prepare a baking sheet by lining it with parchment paper.
Rinse and pat dry. Then trim off the edges of the zucchini and squash. Slice them into quarter-inch slices, then half each slice.
In a medium bowl add the zucchini and squash slices. In a small bowl mix the garlic powder, pepper, and salt. Drizzle the zucchini and squash with olive oil then add seasonings while gently tossing to coat each piece.
Arrange the zucchini and squash slices in a single layer on the lined baking sheet. Bake for 10 to 15 minutes, until the squash is fork tender.
Serve immediately.
Notes
Storing Leftovers: Leftover roasted zucchini and squash can be stored in an airtight container in the refrigerator for 2 days.