Beef Stroganoff
["2 lb. sirloin steak or lesser cut of meat, cut 1-inch thick", "2 c. sliced fresh mushrooms", "1 c. finely chopped onion", "1/4 c. butter or shortening", "2 Tbsp. tomato paste", "1/2 tsp. salt", "1/2 c. sour cream", "3 beef Bouillon cubes", "1 c. boiling water", "1 tsp. dry mustard", "2 Tbsp. flour"]
["In a large skillet, saute mushrooms and onions in 3 tablespoons butter until golden brown.", "Remove from skillet.", "Add remaining butter.", "Brown meat on all sides, 15 minutes.", "Dissolve bouillon in boiling water.", "Pour over meat.", "Add tomato paste, mustard and salt.", "Cover.", "Simmer 45 minutes, until tender."]
["sirloin steak", "mushrooms", "onion", "butter", "tomato paste", "salt", "sour cream", "boiling water", "dry mustard", "flour"]