Put 2/3 cup of mayo in a medium mixing bowl. Add 2/3 cup of buttermilk and 1/2 heaping teaspoon of minced garlic. Add a heaping teaspoon of dill. Add 1 teaspoon red wine vinegar. Add a little salt and pepper. Mix it all up and set aside.
Add the washed lettuce, grape tomatoes, hard boiled eggs, bacon, and chicken to a large bowl. Pour on the dressing and toss.
A wonderful addition to this salad is 1/3 cup crumbled bleu cheese.