Mashed Boniato (White Sweet Potato). Taste-wise, boniato is like a cross between a white potato and sweet potato. If you’re missing the consistency of white potatoes but react poorly to them, this is the dish for you. Because the potato is naturally creamy, you only need to add a little cream to them to get a truly decadent flavor. If you’re dairy-free, they’re still surprisingly creamy when made with only chicken broth.