I use mustard. It's awesome. You can use a spicy mustard or a yellow one. Only like 15 cal in a tablespoon. Plus mustard! Tabasco is great in there too. I like to do tuna with onions, red peppers, celery and a bit of garlic powder, add some mustard, and slap that on an open face piece of toast. When I am feeling fancy I put on a slice of fancy cheese and make a tuna melt. If I just eat it plain I add more veggies. But fuck carrots.