Tuna Noodle Casserole

INGREDIENTS

• 6 oz dried curly egg noodles (preferably Pennsylvania Dutch style; about 3 1/4 cups)
• 2 cups low-sodium chicken broth
• 1/4 cup all-purpose flour
• 1/4 teaspoon salt
• 4 oz coarsely grated Cheddar (1 cup)
• 10 oz mushrooms, trimmed and sliced 1/4 inch thick (4 cups)
• 4 1/2 tablespoons unsalted butter
• 2 teaspoons fresh lemon juice
• 1 medium onion, finely chopped
• 2 teaspoons soy sauce
• 1 (6-oz) can tuna in olive oil, drained
• 1 cup whole milk
• 1 1/2 cups coarse fresh bread crumbs (from 3 slices firm white sandwich bread)
• 1/4 cup Sherry
• 1 tablespoon vegetable oil