Toast the croutons: Heat the oven to 375°F (190°C). Toss bread cubes with olive oil, garlic powder, salt, and pepper.
Spread on a sheet pan and bake 8–12 minutes, stirring once, until golden and crisp. Cool slightly.
Make the dressing base: In a bowl, whisk Greek yogurt, olive oil, lemon juice, Dijon, Worcestershire, garlic, anchovy, and Parmesan until smooth.
Season and adjust: Add salt and pepper. If it’s too thick, whisk in 1–2 tablespoons of water until it coats a spoon but still clings to leaves.
Taste and tweak with extra lemon, pepper, or a pinch more Parmesan.
Prep the greens: Wash and thoroughly dry romaine. Dry leaves grab the dressing better, so spin or pat them very well.
Toss the salad: In a large bowl, combine romaine, grated Parmesan, and just enough dressing to lightly coat. Toss gently with tongs until every leaf is glossy.
Add crunch and serve: Fold in croutons right before serving so they stay crisp.
Finish with extra Parmesan shavings and a squeeze of lemon.
Protein boost (optional): Top with warm grilled chicken, shrimp, or chickpeas to make it a meal.