Sauté the bacon until brown; add onions and sauté until translucent. Drain and set aside. Combine egg yolks, pepper, salt, ground mustard, sugar, vinegar, Worcestershire, & dill on medium speed of mixer. Slowly add oil and blend well. Add bacon and onions. If too thick, thin with vinegar. Adjust the seasonings & serve within 30 minutes. Do not store. Makes 3 cups.