Food Network teaches how to crush, slice and mince garlic. Peel off some of the papery skin from the garlic and then smash the head of garlic with the heel of your hand to loosen the cloves; if you only need a few cloves, leave the head intact and pull some off. Separate the cloves. To peel a clove, cut away the root end with your knife. Lay the flat side of the knife over the clove while holding the knife handle, then with the heel of your free hand carefully whack the knife against the garlic to separate the skin from the clove. To crush the peeled garlic, lay the flat side of the knife over the clove and smash it again. To slice peeled garlic, lay the clove flat on the cutting board and hold it with the fingertips of one hand, keeping them curled under. Using a rocking motion with the knife, make thin slices by moving the knife slowly across the clove. To mince peeled garlic, lay the flat side of a knife over the clove and smash it. Roughly chop the clove then move your free hand flat across the tip of the knife and use a rocking motion to chop the garlic until it’s finely minced.
Sprinkle the chicken with salt and pepper. Dredge the chicken in the flour to coat lightly. Shake off any excess flour. Melt 2 tablespoons of butter in a heavy large skillet over medium heat. Add the chicken and cook until brown, about 5 minutes per side. Transfer the chicken to a plate and tent with foil to keep it warm.
Melt 2 tablespoons of butter in the same skillet over medium heat. Add the shallots and garlic and saute until the shallots are translucent, stirring to scrape up any browned bits on the bottom of the skillet, about 1 minute. Add the wine. Increase the heat to medium-high and boil until the liquid is reduced by half, about 3 minutes. Add the cream and boil until the sauce reduces by half, stirring often, about 3 minutes. Stir in the parsley. Season the sauce, to taste, with salt and pepper. Add the chicken and any accumulated juices to the sauce, and turn the chicken to coat in the sauce.
Meanwhile, melt the remaining 2 tablespoons of butter in another large skillet over medium heat. Add the spinach and saute until heated through. Season the spinach, to taste, with salt and pepper. Arrange the spinach over a platter. Place the chicken atop the spinach. Pour the sauce over and serve.