In a large salad bowl, combine spinach and lettuce; top with crumbled bacon, diced eggs, tomatoes, avocado, cheese and olives.
Step 2
In a separate mixing bowl, whisk together the yogurt, milk, garlic, parsley, salt and pepper. Taste the dressing and adjust accordingly. If you need to thin out the dressing, whisk in a bit more milk, or lemon juice, or olive oil.