Fry bacon, drain. To the grease add vinegar, sugar, onion and crumbled bacon. Heat until hot; pour over lettuce. Garnish with radishes and egg. 

POPPYSEED DRESSING    allrecipes.com

1/3 cup white sugar
1/2 cup white vinegar
1 teaspoon salt
1 teaspoon ground dry mustard
1 teaspoon grated onion
1 cup vegetable oil
1 tablespoon poppy seeds

In a blender or food processor, combine sugar, vinegar, salt, mustard and onion and process for 20 seconds. With blender or food processor on high, gradually add oil in a slow, steady stream. Stir in poppy seeds.

BALSAMIC VINAIGRETTE  allrecipes.com

1/2 cup extra virgin olive oil
1/2 cup white balsamic vinegar
1 clove crushed garlic
1 teaspoon ground mustard
1 pinch salt
ground black pepper to taste

In a small bowl, whisk together olive oil, white balsamic vinegar, garlic, and mustard powder. Season to taste with salt and black pepper. Stir in minced fresh herbs if desired.

DILL VINAIGRETTE  allrecipes.com

1/4 cup vegetable oil
2 tablespoons red wine vinegar
1 1/2 teaspoons white sugar
1/2 teaspoon dried dill weed
1/8 teaspoon salt
1/8 teaspoon onion powder
1/8 teaspoon garlic powder
1/8 teaspoon dry mustard
1/8 teaspoon ground black pepper

In a blender, combine the oil, vinegar, sugar, dill weed, salt, onion powder, garlic powder, dry mustard and pepper. Blend until smooth, cover and refrigerate until chilled.

ABSOLUTELY THE BEST RICH AND CREAMY BLUE CHEESE DRESSING EVER!  allrecipes.com

2 1/2 ounces blue cheese
3 tablespoons buttermilk
3 tablespoons sour cream
2 tablespoons mayonnaise
2 teaspoons white wine vinegar
1/4 teaspoon sugar
1/8 teaspoon garlic powder
salt and freshly ground black pepper

In a small bowl, mash blue cheese and buttermilk together with a fork until mixture resembles large-curd cottage cheese. Stir in sour cream, mayonnaise, vinegar, sugar, and garlic powder until well blended. Season to taste with salt and pepper.

FOOTNOTE : Whole milk may be used in place of buttermilk for a milder flavor. Dressing may be refrigerated in an air-tight container for up to two weeks.