Scrub and peel your sweet potatoes. Cut potatoes into 1/2" cubes. Place in a lightly greased 8x8 baking dish. (I have also used a 1.5 qt. baking dish).
In a small bowl combine the orange juice, melted butter and salt. Pour over the sweet potatoes. Top with cranberries and cover. Bake for 45 minutes or until fork tender. Optional: Stir your potatoes half way through the baking process to coat them with that yummy orange juice!
Uncover and sprinkle with marshmallows and pecans. Return to oven for an additional 8-10 minutes or until marshmallows are all puffy.