Cobb salad with buttermilk ranch dressing

• 2 Baby Gem lettuces
  leaves separated
• 1 avocado
  stoned and sliced
• 2 plum tomatoes
  chopped
• 3 rashers cooked crispy bacon
• 140g/5oz cooked turkey
  breast or chicken, cut into bite-sized pieces
• 2 hard-boiled eggs
  chopped into chunks

For the dressing

• 75ml buttermilk
• 2 tbsp light mayonnaise
• 1 tbsp white wine vinegar
• 1 tbsp chopped dill
• ½ garlic clove
  crushed