Grilled Chicken Caesar Sandwich with Creamy Dressing

Ingredients

• 2 large chicken breasts, boneless and skinless
• 1 tablespoon olive oil
• ½ teaspoon salt
• ¼ teaspoon black pepper
• ½ teaspoon garlic powder
• ⅓ cup mayonnaise
• 2 tablespoons grated Parmesan cheese
• 1 tablespoon lemon juice
• 1 tablespoon Dijon mustard
• 1 teaspoon Worcestershire sauce
• 1 clove garlic, minced
• 4 ciabatta rolls or crusty sandwich buns, sliced
• 2 cups romaine lettuce, shredded
• ½ cup shaved Parmesan
• 1 cup cherry tomatoes, halved
• 4 tablespoons butter, softened