Finely chop the onion. Heat oil in a pan over medium heat and roast the onion for 3-4 minutes until softened and starting to brown.
While the onion roasts, wrap each bacon slice tightly around each dumpling.
In a separate pot, bring 500 ml water to a boil over high heat. Stir in 1 tablespoon of gravy powder until dissolved.
Remove the roasted onions from the pan and set aside. Add the bacon-wrapped dumplings to the same pan with a bit more oil over medium-high heat. Fry for 4-5 minutes on the first side, then flip and fry for 3-4 minutes on the second side until the bacon is cooked and the dumplings are golden brown. Season with salt and pepper to taste.
Arrange the bacon-wrapped dumplings on plates. Pour the hot gravy over them.
Sprinkle the roasted onions on top, place one pickle on each dumpling, and add a small drop of mustard to each one.
Serve with fresh green salad and dry Riesling wine.