Preheat Oven to 400 degrees.
In a small skillet saute the spinach, garlic, and sundried tomatoes until the spinach starts to wilt. Remove from heat and stir in the crumbled goat cheese. Set aside.
Between 2 pieces of plastic wrap pound the chicken breasts (they should be 4-5 ounces each) to a 1/2 inch thickness. Salt and pepper each side.
Take a heaping tablespoon of the filling and place in the middle of each pounded chicken breast. Fold each side over the filling like a like a little package and place in a baking dish with the folds facing up. Don't face them down or your filling will run out.
If you choose, use the bread crumbs (I like Panko.) to just sprinkle over top. Bake at 400 degrees for 20-25 minutes. I like to use an instant read meat thermometer to ensure the middle of the chicken is 165 degrees.
When the chicken is finished, garnish with parsley if desired and serve.