1-First Step: Prep the broccoli rabe Start by trimming 1 to 2 inches off the broccoli rabe stems. This helps remove the tougher ends so the greens cook more evenly. Bring a pot of salted water to a boil, then cook the broccoli rabe for about 1 minute. You want it tender but still bright green. Right after boiling, transfer the greens to ice water to stop the cooking. Drain well and dry them so they do not water down the sandwich. Next, heat a little extra virgin olive oil in a skillet and sauté the broccoli rabe with the sliced garlic and optional red pepper flakes until warmed through. Season with salt and pepper, then finish with the juice of 1/2 lemon.

2-Second Step: Marinate the chicken Place the thin sliced boneless skinless chicken breasts in a bowl or zip-top bag and coat them with the herb and garlic marinade. Let the chicken sit for at least 4 hours, or overnight if you have time. This is where the flavor really builds, and it is one of the easiest ways to turn a simple grilled chicken sandwich into something memorable.

3-Third Step: Grill the chicken Preheat your grill to medium heat. When the grates are hot, place the marinated chicken on the grill and cook for 3 to 5 minutes per side, depending on thickness. Thin sliced chicken cooks quickly, so keep a close eye on it to avoid drying it out. The chicken should be cooked through and have nice grill marks on both sides.

4-Fourth Step: Toast the rolls While the chicken rests, place the wheat sub rolls on the grill for 1 to 2 minutes. Toasting them gives the bread a little crunch and helps it stand up to the juicy fillings. A lightly charred roll also adds that classic grilled sandwich taste that makes this meal feel special.

5-Fifth Step: Build the sandwich Now for the fun part. Open each toasted roll and layer on the broccoli rabe first. Add the grilled chicken, then top it with prosciutto slices, roasted red peppers, and fresh mozzarella. The warm chicken will help soften the mozzarella just enough to make the sandwich creamy and rich.

6-Final Step: Finish and serve If you like a little tang, drizzle balsamic vinegar over the top before closing the sandwich. Press gently, slice if desired, and serve right away while the rolls are warm and the cheese is soft. The final result is a garlic herb chicken sandwich with sweet, salty, savory, and bright flavors in every bite.