A good recipe for chicken Florentine is Food Network's Chicken Florentine Style from Giada De Laurentiis. This recipe received five out of five stars from 614 reviewers, as of 2015, and takes about 30 minutes to prepare.
To make Chicken Florentine Style, season four boneless skinless chicken breasts with salt and pepper. Coat the chicken in flour, making sure to shake off any extra flour. In a large skillet, melt 2 tablespoons butter, then add the chicken and cook five minutes on each side. Move the chicken to a plate tented with foil to keep it warm.
In the same skillet, melt another 2 tablespoons butter, then add 2 tablespoons sliced shallots and 1 tablespoon chopped garlic. Cook for one minute. Stir in 1 1/2 cups dry white wine and bring the mixture to a boil. Boil the wine mixture until the liquid reduces by half. Then, stir in 1 cup whipping cream and boil for an additional three minutes. Add 1 tablespoon fresh parsley, and salt and pepper to taste, then add the chicken to the sauce.
Melt another 2 tablespoons of butter in a separate large skillet. Once the butter is melted, add two 10-ounce packages of thawed frozen spinach. Cook the spinach until heated through, and add salt and pepper to taste. Place the spinach on a serving platter, and top with the chicken. Pour additional sauce over the spinach and chicken.