sliced cheddar cheese
Everyone knows how to make a burger but too many people are putting way too many "extras" on them. Season with herbs and onions for a low fat/low calorie meal. I usually grate half the onion to put in the meat, 1 or 2 Tbsp. Worcestershire sauce, and onion powder. Then I saute the other half of the onion to put on my patty once it's cooked.
An adult should have 25g. of carbs per meal so if you choose to eat the bread - skip the chips. Or if you're like me and like a little crunch with your burger, just eat the meat and splurge on baked chips. Remember to not eat the whole bag and keep in mind that you'll be eating again in 3 hours. :)