Authentic German Potato Salad - cooking recipe

Ingredients

2 lbs baby red potatoes (or your favorite potato)
1 large white onion
1 lb bacon
6 tablespoons vinegar (or to taste)
1/3 cup oil
1 beef bouillon cubes or 1 vegetable bouillon cube
1 bunch green onion
2 tablespoons fresh parsley
3 tablespoons brown mustard (according to your taste)

Preparation

Boil peeled or skins-on (according to your preference) potatoes in water and bouillon for 15-20 minutes. (This may take longer if you are at high altitude). Don't let them get too soft - a fork should go in but the potatoes should not fall apart.
Fry bacon and crumble bacon into small pieces.
Dice the white onion and fry it in the bacon grease.
Chop the potatoes into cubes.
Mix the bacon, white onion, oil, mustard, and vinegar together in a bowl that will be large enough to hold your potatoes.
Chop the green onions.
Toss the cooled potatoes in your sauce along with the green onions.
Sprinkle with parsley, salt and pepper to taste.