German Sausages with Apples, Sauerkraut, and Onion

Ingredients in this Recipe

1 Kirby cucumber, peeled and sliced lengthwise into eighths, for serving
1 large white onion, thinly sliced
1 pound sauerkraut
1 to 2 tablespoons vegetable oil
1/4 cup apple cider
12 links assorted fully cooked German sausages
2 crisp red apples, such as Gala or Braeburn, cored and cut into 1/2 inch slices
Assorted mustards, for serving

See Full Recipe at Martha Stewart