Preheat oven to 400°F. In a large bowl combine chopped sweet potatoes with 2 tablespoon olive oil, paprika, nutmeg, salt and pepper. Spread on a baking sheet and cook for 30 minutes, tossing halfway through. Remove and mash until pureed. Set aside.
To cook the bacon, either cook in skillet or place on parchment-lined baking sheet and cook for 20 minutes in oven at 400°F. Remove, let cool and crumble.
In a medium, heavy saucepan, melt 3 tablespoon butter and 3 tablespoon olive oil over medium heat. Add the shallot and saute until tender but not brown, about 3 minutes. Add garlic and cook for 30 seconds. Add the rice and stir to coat with the butter and oil and cook for about 1 minute.
Deglaze the saucepan with white wine, and simmer over low heat until almost all of the wine has been absorbed. Add ½ cup warm chicken stock and simmer until the stock has almost completely evaporated, about 3 minutes. Continue cooking the rice, adding the stock ½ cup at a time, stirring constantly and allowing each addition of the stock to absorb before adding the next, until the rice is tender but still firm to the bite and the mixture is creamy, about 20 minutes.
While cooking risotto, heat small skillet over medium heat. Add remaining 3 tablespoon butter and cook until browned and fragrant, about 2-3 minutes. Add 2 tablespoon sage and cook for 30 seconds. Remove from heat and set aside.
Stir in 1 cup of the sweet potato puree, goat cheese, Parmesan cheese and brown butter. Serve topped with some chopped sage, extra Parmesan cheese and bacon.