Asparagus Roll-Ups
["1/2 c. butter or margarine", "1 Tbsp. lemon juice", "1 Tbsp. minced onion", "22 to 24 slices white bread", "1 (15 oz.) can asparagus spears, well drained"]
["Combine first 3 ingredients well; set aside.", "Trim crust from bread; roll to 1/2-inch thickness.", "Spread each with a rounded teaspoonful of butter mixture.", "Sprinkle with Parmesan cheese sparingly.", "Place asparagus spear on each slice.", "Roll jelly roll fashion; secure with a wooden pick.", "Brush with melted butter; place on an ungreased baking sheet.", "Bake at 350\u00b0 for 30 minutes. Remove picks; serve warm."]
["butter", "lemon juice", "onion", "white bread"]