These Low Calorie Pesto Chicken Sandwiches are just 379 calories (for the entire sandwich!) and each has 49.6g of protein!I used my low calorie protein bread to make this recipe extra healthy, but store-bought bread will work, and sourdough is especially yummy in this recipe. Special Tip: If you have leftover chicken, you can shred it and add to the sandwich, or if you have a cooked chicken breast, you can halve it into 2 filets if you like.