Today's request included:  Ground Beef, Frozen Green Beans, 1 Sweet Potato.  My solution?
Sweet Potato Shepherd's Pie
(adapted from the same recipe at the "Taste of Home" recipes. Prep time is 25 minutes and the Bake time is also 25 minutes.
1 large sweet potato
1 large white potato
1pound ground beef
1/4 cup chopped onion
frozen green beans
1 cup tomato sauce
2 ounces softened cream cheese (optional)
2 tablespoons butter
2 tablespoons 2% milk
1/4 teaspoon salt
1/4 teaspoon pepper

Scrub and pierce sweet potato and white potato; place on a microwave safe plate and microwave uncovered on high for 10-12 minutes or until tender.  Turn once.
While that is cooking, in a large skillet cook beef and onion until it's cooked through. Drain completely.  Add the beans tomato sauce and spices.  Spray down your casserole dish and then pour the meat mixture into the dish and set it aside.
When cool enough to handle, cut potatoes in half and scoop out the pulp and place in a small bowl.  Mash with butter, milk, softened cream cheese, salt and pepper and spread evenly over the meat mixture.
Bake uncovered at 350 degrees for 25-30 minutes.
***the recipe at Taste of Home uses corn instead of beans and used more spices.

Now this is only one recipe.  There are plenty of things you can do with these ingredients seperately.  I tend to do casseroles because they are easy "one dish wonders".

If you want to do separate "dishes" I would follow the following menu:
 1 pound of ground beef,
1/2 cup bread crumbs
1/2 teaspoon salt
1/2 teaspoon pepper
1/2 cup diced onions
1 egg
mix all ingredients together and form into small meat balls.  Brown off in a skillet until done.
In the same pan, add your favorite BBQ sauce and simmer on low.
green beans
1/4 cup diced onions
1 clove garlic, minced
2 tablespoons butter
1 sweet potato, sliced
1 white potato, sliced
In a separate skillet, stir fry your sliced potatoes with onions and garlic and butter. When these are done and have a nice caramelization on the edges, add in your green beans and saute for a couple of minutes until they are heated through.
Serve with Corn Bread or Corn Bread Muffins.