1. Preheat oven to 450 degres Fahrenheit (230 degrees Celsius).
2. Spread the cubed sweet potato on one baking sheet and the cubed zucchini on a second. Drizzle both with olive oil and sprinkle with salt, pepper, and garlic powder. Place both pans in the oven. Roast the zucchini for 15 minutes and the sweet potato for 30 minutes.
3. Lower oven temperature to 375 degrees Fahrenheit (190 degrees Celsius). Place beef fry on a baking sheet and place in the oven for 30 minutes.