- Preheat your oven to 225°F. Line two baking sheets with parchment paper. 
- In a large bowl, toss the zucchini slices with salt, black pepper, garlic powder, onion powder, and paprika. Let them sit for about 15 minutes to draw out moisture. 
- After 15 minutes, pat the zucchini slices dry with paper towels to remove excess moisture. 
- In a shallow dish, combine the breadcrumbs and Parmesan cheese. Dip each zucchini slice into the breadcrumb mixture, pressing gently to adhere. 
- Place the coated zucchini slices in a single layer on the prepared baking sheets. Drizzle with olive oil. 
- Bake in the preheated oven for 1 to 1.5 hours, flipping halfway through, until the chips are golden brown and crispy. Keep an eye on them to avoid burning. 
- While the zucchini chips are baking, prepare the Greek yogurt ranch dip. In a small bowl, mix together the Greek yogurt, ranch seasoning, lemon juice, dill, salt, and pepper until well combined. 
- Once the zucchini chips are done, remove them from the oven and let them cool slightly before serving with the ranch dip.