There was a pizza place here years ago that made a yummy chicken Florentine calzone. This is my approximation of it.
~2 tbsp each butter and olive oil
4 cloves garlic, sliced thin
12 oz boneless skinless chicken breasts, cut into bite-sized pieces
Salt to taste
8 oz mozzarella, shredded
4 slices bread
Heat olive oil and butter over medium-low until butter is melted. Add garlic and cook for about 5 minutes or until the garlic just starts to brown. Remove garlic and set aside. Turn heat to medium and cook chicken. Remove from skillet with slotted spoon. Mix chicken and cheese in a large bowl until cheese is melted (microwave if necessary to melt). Salt to taste and set aside.
Brown bread in olive oil/butter left in skillet.
You can eat all the ingredients separately or build an imitation calzone. To build, place 1 piece of bread on a plate. Top with chicken/cheese. Place a good bit of spinach on chicken/cheese. Sprinkle with reserved garlic if desired.