Delicious Grilled Chicken Sandwiches with Gruyère Cheese and Honey Dijon Sauce

In the 1980’s, a professionally trained chef developed a menu for a summer outside cafe at the Hyatt on Capitol Square (across from the Statehouse) in Columbus, Ohio, that included this grilled chicken sandwich with melted Gruyère and freshly diced tomatoes. With its European flair and live music, the charming cafe became a magnet for local politicians, office workers, and hotel celebrities—I even remember spotting members of the Grateful Dead stopping in for lunch.

Grilled chicken sandwich with melted Gruyère cheese and freshly diced tomatoes

This recipe takes the humble chicken sandwich to the next level by adding melted Gruyere cheese, fresh diced tomatoes, and a homemade honey Dijon sauce that brings a perfect balance of sweet and tangy notes.

I recreated this for hosting lunch over the holidays for our guests. Whether you’re cooking for yourself, family, or friends, this grilled chicken sandwich recipe is easy to follow and delivers impressive results every time.

Preparing the Chicken Breast

Start by pounding out the chicken breast to an even thickness of about 1/2 inch thick. (I used two large breasts here, which will create 4 servings.) This step is crucial because it ensures the chicken cooks evenly and stays juicy. Use a meat mallet or rolling pin and place the chicken between two sheets of plastic wrap or parchment paper before pounding it to minimize the mess. Please see the image in the gallery below.

Once flattened, brush the chicken with olive oil and season generously with salt and pepper. The olive oil helps keep the chicken moist while grilling and adds a subtle richness.

Dice tomatoes and grates the Gruyèye

Combine sauce ingredients

Honey-mustard sauce ready to go!

Pound chicken to 1/2 inches thick

Grill the chicken about 3 minutes per side

Toast the ciabatta while grilling

Preparing the Honey Dijon Sandwich Sauce

This sauce is the star that ties all the flavors together. Mix the following ingredients in a small bowl, which is enough for six servings (I mixed it in a container that has a lid so I can save the extra for leftovers):

• 1/2 cup mayonnaise

• 1/4 cup honey

• 1/4 cup Dijon mustard

• 1/2 teaspoon paprika

• 1/4 teaspoon chili flakes (adjust to taste)

• 1/4 teaspoon fresh cracked pepper

  
  

Whisk until smooth. The honey adds sweetness, the Dijon mustard brings tang, and the paprika and chili flakes give a gentle kick. This sauce complements the grilled chicken and melted cheese perfectly.

Preparing the Topings

The Gruyère gives the sandwich a touch of class. For four sandwiches, I grated at least 1.5 cups, maybe two.

The idea for using diced tomatoes came from the cafe at the Hyatt. I watched the Commis Chef remove the seeds and dice the tomatoes in preparation for lunch. Dicing two large tomatoes should be sufficient here. The diced tomatoes topping the sandwich make a nice presentation; however, they are a bit sloppy. So, if you prefer a neater eating experience, sliced tomatoes would be fine.

Alternate: Thinly sliced avocado makes a fantastic alternative to the tomatoes or in combination.

Grilling the Chicken

Heat your grill to medium-high. Place the pounded-out chicken breasts on the grill and cook for about 3 to 4 minutes on the first side. When you flip the chicken, add the grated Gruyèye cheese on top. The cheese will start to melt slightly as the chicken finishes cooking, creating a deliciously gooey layer.

Grill the chicken for another 3 to 4 minutes or until the internal temperature reaches 165°F (74°C). Avoid pressing down on the chicken while grilling to keep it tender.

Toasting the Rolls

While the chicken is grilling, toast your choice of brioche or ciabatta rolls. I purchased the rolls in the photos from Aldi.

Toasting adds a slight crunch and prevents the bread from becoming soggy once the sandwich is assembled. You can toast the rolls on the grill for about 1 to 2 minutes or use a toaster oven.

Assembling the Sandwich

Start by spreading a generous amount of the honey Dijon sauce on the bottom half of the toasted roll. Place the grilled chicken breast with melted Grier cheese on top. Add a handful of fresh diced tomatoes for a juicy, refreshing contrast.

Top with the other half of the roll and press lightly to hold everything together. Serve immediately while the chicken is warm and the cheese is melty.

Tips for the Best Grilled Chicken Sandwich

• Use fresh chicken breasts for the best texture and flavor. Avoid frozen chicken if possible.

• Don’t skip pounding the chicken. Even thickness means even cooking.

• Adjust the chili flakes in the sauce to control the heat level. Start with less if you prefer mild flavors.

• Try different rolls like brioche for a soft, buttery bite or ciabatta for a crustier texture.

• Add extra toppings such as lettuce, avocado, or pickles for more layers of flavor and texture.

  
  

Why This Sandwich Works

This grilled chicken sandwich balances several key elements: juicy, well-seasoned chicken, creamy melted cheese, fresh tomatoes, and a sauce that adds sweetness and spice. The toasted roll provides a sturdy base that holds everything together without getting soggy.

The combination of textures and flavors makes each bite satisfying and keeps you coming back for more. It’s a great option for a quick lunch that feels special without requiring complicated ingredients or techniques.

When I made these for my holiday guests, everyone asked for more--which I prepared because these are quite easy.

Enjoy this grilled chicken sandwich with a side of crisp salad, chips, or your favorite pickles for a complete meal.