Company Squash Casserole
["1 lb. (about 3 medium size) yellow squash, chopped", "1 medium onion, chopped", "3 Tbsp. butter or margarine", "2 Tbsp. all-purpose flour", "1 c. milk", "5 slices processed American cheese, chopped", "1 (3 oz.) can chopped mushrooms, drained", "2 Tbsp. butter", "1/2 c. cracker crumbs", "1/2 c. chopped pecans"]
["Place squash and onion in boiling salted water, just enough to cover.", "Cover and cook 5 minutes; drain well and set aside.", "Melt 3 tablespoons butter in a heavy saucepan over hot heat; add flour and cook 1 minute, stirring constantly.", "Gradually add milk; cook over medium heat, stirring constantly, until thickened and bubbly. Add cheese and stir until melted.", "Combine the squash mixture, cheese sauce and mushrooms; spoon into a lightly greased 1 1/2-quart casserole.", "Melt 2 tablespoons butter in a small saucepan; stir in cracker crumbs and pecans.", "Sprinkle mixture over squash.", "Bake casserole at 350\u00b0", "for 30 minutes."]
["yellow squash", "onion", "butter", "flour", "milk", "American cheese", "mushrooms", "butter", "cracker crumbs", "pecans"]