In a shallow dish, whisk together breadcrumbs, flour, garlic powder, dried thyme, salt, and pepper; set aside.
Place the chicken strips in a bowl and pour the buttermilk over them; stir to coat, cover, and refrigerate for 30 minutes to marinate.
Remove chicken from buttermilk, letting excess drip off, then dredge a few strips at a time in the breadcrumb mixture, coating evenly.
Coat a nonstick skillet with cooking spray and heat over medium. Add the olive oil and when hot, cook the chicken strips 3 minutes per side until golden and cooked through.
Divide the chopped romaine among 4 plates or large bowls. Top each with the cooked chicken strips and halved cherry tomatoes.
Drizzle 2 tablespoons of honey Dijon dressing over each salad and sprinkle each with 2 tablespoons of crumbled blue cheese before serving.