Mom's Chicken Tetrazzini Recipe

Preheat oven to 375 °. Cook spaghetti according to package directions for al dente. Drain; transfer to a greased 13x9-in. baking dish. Add 2 teaspoons butter and toss to coat. Meanwhile, in a large skillet, cook bacon over medium heat until crisp, stirring occasionally. Remove with a slotted spoon; drain on paper towels. Discard drippings, reserving 1 tablespoon in pan. Add mushrooms, onion and green pepper to drippings; cook and stir over medium-high heat 5-7 minutes or until tender. Remove from pan. In same pan, heat remaining butter over medium heat. Stir in flour, salt and pepper until smooth; gradually whisk in broth. Bring to a boil, stirring occasionally; cook and stir 3-5 minutes or until slightly thickened. Add chicken, peas, pimientos and mushroom mixture; heat through, stirring occasionally. Spoon over spaghetti. Sprinkle with bacon and cheese. Bake, uncovered, 25-30 minutes or until golden brown. Let stand 10 minutes before serving.