1. Cook bacon in a large skillet over medium-high heat until crisp, about 5 minutes. Remove bacon to a paper towellined plate. When bacon has cooled, crumble.
2. In a medium bowl, whisk together yogurt, lemon juice, olive oil, garlic and salt.
3. Toss romaine with 2 Tbsp. yogurt dressing and place on a serving platter. On top of romaine, arrange chicken, tomatoes, avocado, blue cheese and bacon in rows. Drizzle with remaining dressing and serve immediately.