1. Trim bread crusts, and discard. Cut bread into 1-inch cubes. Arrange bread cubes in a single layer on a baking sheet. Coat bread cubes with cooking spray, and sprinkle with garlic powder; toss well. Bake at 350¼ for 15 minutes or until lightly browned; set aside.
2. Coat a large nonstick skillet with cooking spray; place over medium-high heat until hot. Add chicken; saute 6 minutes on each side or until done. Remove chicken from skillet; let cool. Cut chicken across grain into thin\par slices; set aside.
3. Combine lemon juice and next 5 ingredients in container of an electric blender; cover and process until smooth. Add 1/4 cup lemon juice mixture to chicken, tossing gently to coat.
4. Place lettuce in a large bowl; drizzle remaining lemon juice mixture over lettuce, and toss well. Add chicken mixture and cheese, tossing gently to coat. Serve with croutons.
Yield: 7 servings (serving size: 1-1/2 cups salad and 1/3 cup croutons).