Find an attractive lettuce leaf with no brown spots. The recipe gives you plenty of vegetables to choose from. Use only the center slices of the best tomato. Spray the tomato with a mist of water and glycerin to keep it looking fresh. Ready to take a bite? It isn't too tough to make a mouth-watering burger at home. But could you make it look delicious even after it sits for hours under bright lights in a photo studio? Here's how: RECIPE 3 lbs Ground beef Vegetable oil Brown food coloring or molasses 100 hamburger buns 2 cases of lettuce a dozen tomatoes paper towels Superglue tweezers paintbrush waterproof spray glycerin and water (glycerin is a syrupy, sweet liquid made from oil) TEACHERS | PARENTS | GLOSSARY | ABOUT THIS SITE © 2002-04 KCTS Television. All rights reserved. Funded by the Corporation for Public Broadcasting. PBS Privacy Policy