Clean the dandelion, dry and cut into 1 inch pieces. Fry the bacon in a heavy cast iron pan until crisp. Then remove from pan and drain on paper towel. Save some bacon fat in the pan. Meanwhile, mix the eggs, mayo, sugar, vinegar, salt, and milk. Beat until well mixed. Turn pan on med high heat, stir in the flour with the bacon fat and mix to make a rue. Then add the liquid mixture slowly and bring to a boil. Stir it constantly. Turn down heat and add the bacon and the dandelion. Stir for a few minutes until dandelion is wilted and heated through. Serve over potatoes.