Oma Ingrid's German Potato Salad

2 pounds Yukon gold potatoes
2 tablespoons canola oil
2 tablespoons apple cider vinegar
1 tablespoon white vinegar
1/4 - 1/3 cup hot vegetable broth (water with a vegetable bullion cube dissolved)
1/2 medium onion, chopped
1 tablespoon brown deli mustard
Salt and Pepper to taste
2 tablespoons parsley, minced
2 tablespoons chives, finely chopped

Preparation:

Wash potatoes, place in a double boiler/steamer basket over hot water and cook until tender. Remove and let cool for about 5 minutes, then peel and cut into quarters which are then cut into 1/8 inch slices and place in a large bowl.

Immediately after slicing the potatoes, add the oil, vinegars, and 1/4 cup of the broth. Carefully toss to coat. Add onions, mustard, herbs, and season with salt and pepper. If your potato salad seems dry, add the rest of the broth. Serve or refrigerate until ready for use.
from susi's kochen