I don't even call them yams. I prefer "sweet potato", but I do call them delicious. They're pretty versatile. You can do something simple like peel and slice up a few, french fry-style, then toss with olive oil and your favorite seasoning (simple like kosher salt or more adventurous use your imagination) until evenly coated. Then put them on a cookie sheet and bake for 25-40 minutes at 425. Voila. Sweet potato fries!
My latest favorite recipe:
Two sweet potatoes peeled and cubed. Boil with a little salt for about 10 minutes until almost tender. While potatoes are boiling slice up red onion and saute in olive oil. Drain your sweet potatoes and add them to the onions. Add about 2 Tsp cumin and 2 Tsp coriander and saute for a few more minutes. Looks like this and is delish:
I've been eating this with a big scoop of my black beans (canned black beans mostly drained, with salsa, chili powder and cumin to taste.) I made it into a burrito one night, but am really digging it just in a bowl with the black beans!