Brush the grill grates clean the brush them with oil. Preheat the grill to medium-high (400-425°F).
Mix together the olive oil, minced garlic, Italian seasoning, salt, and pepper in a medium bowl. Add the chicken breasts and turn to coat.
4 boneless skinless chicken breasts, 2 Tablespoons olive oil, 2 cloves garlic, 3 teaspoons Italian seasoning, Salt and pepper to taste
Add the chicken to the hot grill, close the lid, and grill the chicken for 5-6 minutes on the first side. Flip the chicken, cook for 2 more minutes, then add the mozzarella cheese. Close the lid and continue cooking until the cheese melts and the internal temperature reaches 165°F/74°C. Remove to a clean plate or cutting board to rest.
4 oz fresh mozzarella cheese
While the chicken is cooking, toss together the diced tomatoes, balsamic vinegar, and fresh sliced basil. Sprinkle with a pinch of salt.
1/2 cup cherry tomatoes, 2 Tablespoons balsamic vinegar, 1/4 cup fresh basil leaves
Make a quick homemade pesto if you haven't already. Top each chicken breast with 1-2 Tablespoons of pesto and spread it out. 1/2 cup basil pesto
Spoon the tomato basil on top and finish with fresh cracked black pepper. Serve right away!
Store leftover margherita chicken in an airtight container for up to 3 days. I like to reheat it in the airy fryer at 375 for 6-8 minutes (oven works too).