Mix chicken, salsa verde, refried beans and sour cream.
Dip tortilla in melted butter.
Place about 1/4 cup of the chicken mixture in the center of each tortilla.
Fold the tops and bottom of tortilla over filling.
Fold the sides in and place seam side down in a in a casserole dish.
Bake at 450 degrees for about 15 minutes or until golden brown.
Add shredded cheese and put back in oven for 5 minutes or until cheese is melted.
Top with garnishes, if desired.