Preheat oven to 450 F. Line baking sheet with aluminum foil. Place bread in medium bowl, spray with cooking spray; sprinkle with garlic salt, thyme, and pepper and then toss. Spray again with cooking spray and toss once again. Place bread onto prepared baking sheet; bake until golden brown; stirring occasionally; about 10 minutes.
In food processor (use metal blade) while machine is running, drop garlic through feed tube, process until chopped. Add anchovies, lemon juice, mustard and Worcestershire sauce; process until combined. Gradually add oil, processing until slightly thickened.
Cut Romaine lettuce into 1-inch pieces, place in salad bowl. Toss in dressing, then toss with grated Parmesan cheese and croutons. Top with shaved Parmesan if desired.