So, make the dressing. Don't buy the store bran stuff as it's probably full of crap. Details bellow, but all you really need is blue cheese, sour cream and vinegar. The secret to success is the lettuce has to be crispy and ice cold.

Ingredients

• 1 head iceberg lettuce
• 8 slices bacon , cooked, cooled and crumbled
• 1 1/2 cups cherry tomatoes , halved
• 1/2 cup red onion , chopped
• pecans , or walnuts, toasted (optional)
• 1 cup sour cream , light 
• ½ cup mayonnaise
• 3 Tablespoons buttermilk
• 3 teaspoons red wine vinegar
• ½ teaspoon Worcestershire sauce
• 1/4 teaspoon garlic salt
• 1/2 teaspoon freshly ground black pepper , or to taste
• 4 ounces blue cheese , reserve a few spoonfuls for garnish

Instructions

Add all of the dressing ingredients to a medium bowl and stir well to combine. Refrigerate for at least 30 minutes, or can be made several days in advance.

Cut the bacon into pieces and cook the bacon in a skillet until crisp. Remove to a plate lined with paper towels.

Cut the iceberg lettuce in half. Cut each of the halves again in half or thirds (depending on how big the ice berg lettuce head is), to create "wedges". Place wedges on individual plates. 

To serve, spoon dressing over lettuce and then sprinkle the bacon crumbles, tomatoes, onion and blue cheese crumbles on top. Season with fresh crushed black pepper, to taste.