Blend Greek yogurt, parmesan, garlic, capers, Dijon mustard, lemon zest, lemon juice, and black pepper in a small blender or food processor to make the dressing.
Preheat a skillet over medium-high heat.
Toss shrimp with olive oil, salt, and pepper in a bowl.
Transfer shrimp to the preheated skillet and cook until opaque, about 2-3 minutes per side.
Preheat the oven to 400°F for the croutons.
Cut bread into bite-sized pieces and place them on a baking sheet.
Toss bread with olive oil, salt, pepper, and garlic powder until evenly coated.
Bake the bread for 5-10 minutes, or until golden and crispy.
In a large salad bowl, add chopped romaine lettuce.
Toss the lettuce with the prepared dressing, cooked shrimp, and croutons.
Serve immediately and enjoy.