They’re easy enough to bake/roast and then top (that’s my usual approach: my partner likes them with channa masala or a dal/lentil).
Can also cut into chunks with other root vegetables and onions, garlic, etc, and roast.
My sister makes a peanut and sweet potato soup/stew (sometimes chunky, sometimes pureed) that includes peanut butter, raw peanuts, ginger, onions, tomatoes and coconut milk, with shredded greens (probably kale, knowing her).
Also sweet potato pie!
(Confession: I absolutely despise sweet potatoes and yams - I’m now “mature” enough get down a bite or two, but it’s a struggle. No idea why the aversion.)