1-First Step: Prep the chicken and greens Start by placing the thin sliced boneless skinless chicken breasts in a bowl or shallow dish. Coat them with the herb and garlic marinade and let them sit while you prep everything else. Even a short marinating time gives the chicken a lot more flavor. If you have extra time, let it rest in the fridge for 30 minutes to 2 hours. Next, wash the broccoli rabe well and trim any tough ends. This green can have a naturally bitter edge, so a quick sauté helps soften it and bring out the best flavor. Slice the garlic, measure out the lemon juice from half a lemon, and keep your salt, pepper, and red pepper flakes nearby. That way, once the pan gets hot, everything moves fast.

2-Second Step: Cook the broccoli rabe Set a large skillet over medium heat and add a drizzle of extra virgin olive oil. Once warm, add the sliced garlic and cook for about 30 seconds until fragrant. Be careful not to brown it too much because garlic can turn bitter quickly. Add the broccoli rabe to the skillet with a pinch of salt and pepper. If you like a little heat, sprinkle in some red pepper flakes. Cook for 4 to 6 minutes, stirring often, until the greens are tender but still bright. Finish with the lemon juice from half a lemon and toss everything together. The lemon makes the greens taste fresh and lively.

3-Third Step: Grill the chicken Preheat a grill pan, outdoor grill, or skillet over medium-high heat. Lightly oil the cooking surface if needed. Place the marinated chicken on the hot surface and cook for about 3 to 5 minutes per side, depending on thickness. Thin sliced chicken cooks quickly, so keep an eye on it. You want the chicken to reach an internal temperature of 165 F. Once cooked, transfer it to a plate and let it rest for a few minutes. Resting helps the juices settle back into the meat so every bite stays tender. If you are using a grill pan, you will get lovely sear marks and a nice smoky flavor.

4-Fourth Step: Warm the rolls and layer the fillings While the chicken rests, split the wheat sub rolls and warm them lightly in the oven, on the grill, or in a dry skillet. This step gives the bread a soft inside and a lightly crisp outside. It also keeps the sandwich from getting soggy once you add the fillings. To build each sandwich, layer the grilled chicken on the bottom roll, then add fresh mozzarella, roasted red peppers, and a few slices of prosciutto. Top with the broccoli rabe so the greens sit nicely against the warm cheese and chicken. The mix of salty, creamy, smoky, and bright flavors is what makes this sandwich so fun to eat.

5-Final Step: Finish with balsamic and serve Drizzle a little balsamic vinegar over the filling just before closing the sandwich. It adds a sweet tang that ties all the ingredients together. Press the sandwich gently, slice it in half if you want, and serve while the cheese is still slightly soft. If you want a fuller meal, pair it with a simple salad, roasted potatoes, or a cup of soup. This Garlic Herb Grilled Chicken Sandwich is best served warm, right when the flavors are at their peak.