1.Preheat An Outdoor Grill For Medium Heat; Lightly Oil The Grate. 2.Place Basil, Oil, Garlic, Romano Cheese, Oregano, And Pepper Into A Blender. Blend On High Until Smooth, Adding Additional Oil If Necessary, About 30 Seconds. 3.Grill Chicken Until Juices Run Clear, About 5 Minutes Per Side. Do Not Turn Off Grill. 4.Spoon 1 Tablespoon Of Caesar Dressing Onto 2 Slices Of Bread. Top Each With Lettuce, And An Additional Slice Of Bread. Spread The Second Slice Of Bread Thickly With The Pesto. Top Each Sandwich With A Cooked Chicken Breast, A Slice Of Smoked Mozzarella, And The Remaining Bread. 5.Grill Sandwiches Until The Cheese Is Melted, And The Bread Is Toasted, About 3 Minutes Per Side.