Make a bright, easy Basil Pesto Chicken Sandwich—ready in 15 minutes, perfect for lunches and gatherings.
In a medium bowl, combine the drained premium chunk chicken breast (shredded into flakes) with 1/4 cup low-fat mayonnaise. Use a fork to break up any large pieces and fold gently until the mixture is uniformly moistened but still visibly chunky—little strands of chicken and glossy mayonnaise should cling in soft, textured ribbons. Season lightly with salt and pepper to taste and set the bowl aside; this is the creamy, substantial base that will receive the vivid pesto brightening in the next step.
In a small food processor pulse 1 cup fresh basil leaves with 1 clove garlic, 1/4 cup grated Parmesan, and 2 1/2 tablespoons olive oil until it becomes a coarse, emerald-green pesto—bright, slightly oily, and flecked with tiny herb fragments and cheese granules. Taste and adjust with a pinch of salt and black pepper so the pesto is lively but not oversalted. Transfer the pesto into a small glass jar or ramekin so it stays contained and glossy until it's folded into the chicken.

Spoon the prepared pesto into the same medium mixing bowl holding the chicken and mayonnaise, then gently fold until the pesto is completely incorporated—no streaks of plain white mayo should remain, but the mixture should still be texturally chunky with visible green flecks. The result is a moist, herb-speckled chicken salad with a creamy sheen and soft shreds of chicken carrying pockets of bright basil flavor. Keep the mixing bowl nearby as you prepare the bread and toppings.
Split fresh hoagie rolls lengthwise, toast lightly if desired, and pile the pesto chicken mixture generously onto the bottom halves. Layer optional crisp spinach leaves, juicy red tomato slices, and slivers of mozzarella/ provolone cheese for cooling creaminess. Close the sandwiches, place each on a sheet of parchment paper, and serve immediately—cut on a diagonal to reveal the vibrant green-speckled filling and the warm golden crust of the roll.
