Baked Stuffed Onions
["6 large onions", "1/2 tsp. salt", "2 Tbsp. vegetable oil", "1/4 lb. ground beef", "1 c. cooked rice", "1 egg yolk", "1/2 c. soft bread crumbs", "1/2 tsp. salt", "1/2 tsp. pepper", "2 Tbsp. melted butter", "2 Tbsp. grated Parmesan cheese", "1/2 c. soft bread crumbs", "1 Tbsp. chopped parsley"]
["Cut off root; peel and rinse onions.", "Cut a 1/2-inch slice from the top of each onion.", "Cook onion, uncovered, in salted water to cover for 10 to 15 minutes or until slightly tender. Drain well; cool.", "Heat oil in skillet; add ground beef and saute until browned.", "Scoop centers out of onions; chop and add to ground beef.", "Saute until golden.", "Combine rice, egg yolk, salt, pepper and bread crumbs with meat mixture.", "Fill onions.", "Mix together melted butter, cheese, parsley and bread crumbs.", "Spread over top of onions.", "Bake in a greased casserole in a 350\u00b0 oven for 1 hour.", "Serves 6."]
["onions", "salt", "vegetable oil", "ground beef", "rice", "egg yolk", "bread crumbs", "salt", "pepper", "butter", "Parmesan cheese", "bread crumbs", "parsley"]