Season the chicken breast with sea salt, black pepper, and garlic powder.
Pan-sear the chicken over medium heat until golden and cooked through, then set aside to rest before dicing.
Cook the bacon in the same pan until crisp, then drain on a paper towel and crumble.
Place the egg in a small pot of boiling water for 9 minutes, then transfer to an ice bath, peel, and slice.
In a small bowl, whisk together the Greek yogurt, lemon juice, and blue cheese crumbles to create the dressing.
Chop the romaine lettuce and place it in a large serving bowl.
Arrange the diced chicken, crumbled bacon, sliced egg, halved cherry tomatoes, and sliced avocado in neat rows over the lettuce.
Drizzle the velvety blue cheese dressing over the top and serve immediately.