The green beans and red peppers in my version are fairly traditional, but you'd normally find white potato in place of the sweet potato if you got this in a restaurant. (connoisseurusveg.com)
Pumpkin puree will work in place of the sweet potato flesh if you have that handy. (sproutedkitchen.com)
Or use butternut squash in place of sweet potatoes. (soupaddict.com)