Spread the cubes of squash out on a baking sheet and toss with the ghee or coconut oil. Season with salt and pepper. Roast for about 30 min at 350F (180C), stirring occasionally, until soft.
Optional: wash the squash seeds, pat dry, and mix with olive oil and salt. Roast in a single layer for about 15 minutes, or until seeds start to pop.
At the same time, place the corn (still in the husks) directly on another shelf in the oven and cook for 20 minutes. Allow to cool and then cut the kernels off the cobs.
Combine the dressing ingredients and mix well.
Toss the roasted squash with the corn, feta cheese, and basil leaves. Serve over a bed of greens. Garnish with additional feta and pumpkin seeds (optional).