Preheat the oven to 425°F.
Roast the sliced delicata squash with salt, pepper and 1 tablespoon of olive oil for 15-20 minutes. Remove and set aside. Reduce the oven to 350°F.
Place the cubed butternut squash and stock in a pot and bring to a boil. Reduce to a simmer and cook until the butternut squash is fork tender. Remove from heat, carefully puree with an immersion blender and set aside. It should equal 4 cups, if not add stock to make 4 cups worth
Meanwhile, heat the remaining oil in an oven proof braiser or skillet over medium heat and cook the onion and sage, stirring occasionally, for 5 minutes or until onion softens. Add the garlic and rice; stir to coat and toast for 2 minutes. Carefully pour in the butternut squash mixture and half the parmesan cheese, stir to combine and season to taste
Cover the dish with foil or a fitted lid. Transfer the risotto to the oven and bake for 15 minutes. Remove and stir gently and add ½ cup of water or stock. Tuck the delicata squash into the braiser, pushing them in slightly; place camembert in the center. Transfer back into the oven and bake for another 20-25 minutes or until the rice is tender
Combine wild arugula, lemon juice and olive oil in a medium bowl and season to taste. Serve risotto topped with remaining parmesan and accompany with the arugula mixture on top or on the side