Preheat your oven to 425 degrees F. Prepare two baking sheets by lining them with parchment paper or greasing them.
Steam the sweet potato cubes until tender, about 10-15 minutes. You can do this by placing them in a steaming basket over boiling water or using a microwave-safe bowl with a bit of water, covered, and microwaved on high for 5-7 minutes.
Transfer them to a large bowl and mash them with a fork or potato masher until smooth. Season the mashed sweet potatoes with sea salt, black pepper, Parmesan cheese, garlic powder, cayenne pepper (if using), and oregano. Mix well. wl and drizzle the seasoned oil over them, tossing to coat each cracker.
In a separate shallow dish, combine the regular breadcrumbs and panko breadcrumbs. This will be your coating mixture.