Delicious Tuna Noodle Casserole

No canned soup in this wonderful version!!

Preheat oven to 375 degrees.

Rub inside of a 2 1 / 2 quart casserole dish with 1 tablespoons butter.

Bring large pot of salted water to boil over high heat.

Add noodles and cook until al dente , 5-7 minutes.

Drain and transfer noodles to a large bowl.

Melt 4 tablespoons butter in a medium saucepan over medium-high heat.

Add half the scallions and cook until softened , 1-2 minutes.

Add flour and mustard and cook , stirring frequently , for 1 minutes.

Gradually pour in milk , whisking constantly , and bring to a boil.

Cook sauce , stirring frequently , until smooth and thickened , 16-18 minutes.

Season with salt and pepper to taste.

Transfer sauce to bowl with noodles.

Add tuna and stir gently to combine.

Transfer tuna-noodle mixture to prepared dish.

Melt remaining butter and toss with remaining scallions , bread crumbs , and salt and pepper to taste in a bowl.

Scatter seasoned bread crumbs over tuna-noodle mixture and bake until golden brown and bubbling , 20-25 minute.

butter, salt, flat egg noodles, scallions, flour, dry mustard, milk, fresh ground black pepper, tuna in vegetable oil, fresh breadcrumbs