Sole - With greens

1/2 lb white mushrooms or 1/2 lb cremini mushroom 4 medium cold cooked potatoes , sliced 2 tablespoons butter 1 1/2 teaspoons salt 1/2 teaspoon black pepper 1[...]

cooking spray 1 lb fillet of sole (or other thin fish fillets) 2 tablespoons fresh parsley , minced 1 tablespoon fresh mint , chopped 2 teaspoons vegetable[...]