Preheat the oven to 400 degrees Fahrenheit. Peel the butternut squash and slice it into even-sized fries, roughly 1/2 inch thick. Arrange the fries in an even layer across a shallow oven tray. Season with salt and pepper and drizzle over the olive oil. Toss to combine, coating the fries in the oil and seasonings.
Transfer to the oven and bake for 25 minutes, turning halfway through. The fries should be tender and golden, starting to caramelize at the edges. Remove from the oven and sprinkle over the grated parmesan and grated cheddar cheese. You may use alternative shredded cheeses if preferred.
Return the cheese-covered fries back to the oven. Bake for a further 5-7 minutes or until the cheese is melted, golden and bubbling. Serve hot as an accompaniment to your preferred Keto kid-friendly mains.