Oh sooo many ways.
yams/sweet potatoes I like to just toss in foil, and bake at 400 for 30 min to 1hr or until tender to touch. eat plain, toss on brown suger or honey, maybe a pad of butter if you dare.
Or slice thin pieces and make like fries, they are goood.
breakfast, slice to make moons or thin circle slices, and fry with onion and garlic.
same as yams, put in foil and in oven for 30-1hr. eat whole with a little bit o salt.
Make mashed potatoes: dont peel a potato, unless regular idahoe spud. Cut in chinks, drop in boiling water, wait til tender, take out and drain water, grab a masher, add some milk garlic and cream cheese, maybe chives, and dig in.
If you have left over mashed potatos, drop them on a frying pan and make potatoe pankakes in the morning.