Grilled Chicken Sandwiches

1 . Stage

Preheat the grill to medium-high heat.

2 . Stage

Prick chicken breasts all over with a fork, then place in a large bowl. Add 1/4 cup olive oil, white wine vinegar, lemon juice, dill, garlic and herb seasoning, and black pepper to the bowl. Stir to coat chicken breasts thoroughly. Let stand for 10 minutes.

3 . Stage

Remove chicken breasts from marinade; discard marinade.

4 . Stage

Cook chicken on the preheated grill until no longer pink in the center and juices run clear, 10 to 15 minutes per side. An instant-read thermometer inserted into the center of a breast should read at least 165 degrees F (74 degrees C). Transfer chicken to a cutting board; let stand for 5 minutes, then cut chicken breasts in half.

5 . Stage

Melt butter and 2 tablespoons olive oil in a skillet over medium-high heat. Sprinkle garlic powder and salt over butter and oil. Add French bread slices to the skillet; toast until golden brown on one side, about 3 minutes; remove from the pan.

6 . Stage

For sandwich assembly, place 1 French bread slice, toasted-side down, onto a serving plate. Spread mayonnaise on bread; top with a tomato slice, then season with salt and pepper. Cover with a grilled chicken breast half and lettuce leaf. Spread untoasted side of another French bread slice with mayonnaise and place on top to make a sandwich.