Creamy Chicken, Spinach and Mushroom Enchiladas

Bahan-bahan (6 porsi)

• ½ cup (1 stick) butter
• ½ cup all purpose flour
• 3 cups chicken broth
• 8 ounces sour cream
• 4 ounces cream cheese
• ½ cup green taco sauce
• Twelve 8-inch flour tortillas
• 4 cups (about 2 large breasts) cooked, shredded chicken
• One 10-ounce package frozen chopped spinach, (thawed & squeezed dry)
• 8 ounces sliced mushrooms
• 1 large (about ¾ cup) shallot, (finely chopped )
• 1 pound (16 ounces) grated Monterey Jack Cheese