Cheesy Green Bean Casserole
["2 cans French-style green beans (drained)", "1 medium onion chopped", "1/4 stick butter", "1 Tbsp. flour", "1 can cream of mushroom soup", "1 can mushroom pieces (drained)", "1 jar pimentos (chopped and drained)", "1/2 lb. velveeta cheese", "1/2 Tbsp. worcestershire sauce", "Salt and pepper to taste", "1 can French fried onion rings"]
["In large skillet saute onion in margarine and stir in flour slowly.", "Add all other ingredients (except beans) and heat until velveeta is melted.", "In 2 qt. casserole dish alternate layers of beans and mixture.", "Top with onion rings.", "Bake at 350\u00b0 for about 30 minutes.", "Serves 6 to 8."]
["green beans", "onion", "butter", "flour", "cream of mushroom soup", "mushroom", "pimentos", "velveeta cheese", "worcestershire sauce", "Salt", "onion"]