Ingredients
Equipment
Method
- Heat the oven to 375°F (190°C) and butter a 9x13-inch baking dish. Cook the spaghetti in well-salted boiling water 2 minutes less than the package time. Drain and rinse briefly with warm water.
- Melt 1 tbsp butter in a large skillet over medium-high heat. Brown the mushrooms 6 to 8 minutes until their liquid cooks off. Add the onion for 3 to 4 minutes, then the garlic for 30 seconds.
- Lower the heat to medium, add the remaining 4 tbsp butter, sprinkle in the flour and stir 1 to 2 minutes.
- Add the sherry, if using, for 30 seconds. Slowly whisk in the broth, then the milk and cream. Add salt, pepper, thyme and nutmeg and simmer 4 to 5 minutes until the sauce coats a spoon but is still pourable.
- Off the heat, stir in 3/4 cup Parmesan. Fold in the chicken, peas and spaghetti, then spread in the baking dish.
- Top with the remaining Parmesan and the panko tossed with melted butter. Bake uncovered 25 to 30 minutes, until bubbling, golden and 165°F (74°C) in the center.
- Rest 5 to 10 minutes, sprinkle with parsley and serve.
Notes
Make ahead: assemble without the crumbs and refrigerate up to 24 hours, or freeze up to 3 months and thaw overnight in the fridge. Drizzle with 1/4 cup broth, add the crumbs, bake covered 20 minutes, then uncovered 20 to 25 minutes to 165°F. Refrigerate leftovers within 2 hours for 3 to 4 days. Calories are an estimate per serving from USDA FoodData Central values.
