Beef Tenderloin With Spanish Onions Recipe ingredients

• 3 pounds beef tenderloin, in 1 piece
• 4 Spanish onions, peeled, cut in halves
• 4 tablespoons butter
• 1/3 cup water
• seasonings to taste

To prepare this Beef Tenderloin With Spanish Onions Recipe, first put all ingredients in a roasting pan. Bake in moderate oven for about 40 minutes, Baste the onions more often than the beef. Serve.