While the pasta cooks, heat the oil in a saucepan over medium heat. Add the onion, cover and cook for 4 minutes. Stir in the garlic, sage, and red pepper flakes and cook for 30 seconds, then stir in the wine, pumpkin, broth, salt, and pepper. Cook over medium heat, stirring, until smooth and hot, then stir in the almond milk. Taste and adjust the seasonings, if needed