For extra flavor, roast a head of garlic and add a few cloves to the potato filling. This adds a depth of sweetness that complements the other flavors. If you don't have time to soak the cashews overnight, you can quick-soak them by boiling them in water for 15 minutes, then draining and rinsing them. Feel free to customize the fillings with your favorite toppings, such as chopped green onions, diced tomatoes, or a sprinkle of vegan cheese.