Mustardy Chicken Roulades

• 4 tablespoons full-fat creme fraiche (or sour cream)
• 1 tablespoon Dijon mustard
• 2 garlic cloves, finely minced
• 1 1/2 tablespoons finely chopped chervil
• 1/2 tablespoon finely chopped tarragon
• 1/4 teaspoon finely grated zest from a Meyer lemon (if you haven't got access to Meyer lemons use an ordinary lemon, but in slightly smaller quantities)
• Eventually a little freshly squeezed juice from a Meyer lemon (or ordinary lemon)
• Salt and freshly groung pepper
• 1.5 pounds skinless chicken breasts (how many this is will of course depend on their size)
• 4-5 ounces pancetta (or bacon) in very thin slices (again; the number of rashers will depend on their size)
• 1/2 cup dry white wine
• 1 cup chicken broth
• Knob of butter
• 1 pound button mushrooms, sliced
• 1 medium leek, sliced
• Salt and freshly ground pepper
• 1 tablespoon finely chopped parsley

1. Mix together creme fraiche, mustard, garlic, chervil, tarragon and lemon zest. Season to taste with salt and pepper. Also add a little lemon juice if the mixture needs more acidity. Set aside.
2. For each chicken breast: Use a sharp, thin-bladed knife and make an incision into the long side.. Cut carefully into the meat until you almost get to the other side (do not cut through!). Fold the breast open like a book. Place between two sheets of clingfilm, and bash with a rolling pin, until it becomes less than half as thick as it was. Cut the thin chicken 'sheets' into ribbons, each approx. 2 inches wide.
3. Slather each long, thin chicken ribbon with mustard mixture. Roll up. Wrap each chicken roll in pancetta. Tie with cotton string - two per roll.
4. Fry the rolls in a wide pan, turning them over as the pancetta browns. Add wine and broth and simmer, turning the chicken rolls now and then, for 7-8 minutes, or until the chicken is nearly cooked through.
5. Meanwhile, fry the mushrooms over high heat in a bit of butter. Turn the heat down, add leek, and cook until it is completely wilted, approx. 5 minutes. Add to the pan with the chicken, and cook until the chicken is done - this will only take a couple of minutes. Season with salt and pepper, and stir in the parsley.
6. Serve with lemon wedges and steamed spinach or other greens. Tomato salad tastes nice on the side, too.

fullfat crueme, mustard, garlic, chervil, tarragon, lemon, freshly squeezed juice, salt, chicken breasts, pancetta, white wine, chicken broth, butter, mushrooms, salt, parsley

Taken from food52.com/recipes/1029-mustardy-chicken-roulades (may not work)