I Miss the Knife

So far, the silverware utensile I've missed the most is the knife. The spoon and the fork can be easily replaced by chopsticks or cups; unfortunately, it hasn't been as easy to find a good substitute for the knife. Until know, the only solution I could find was the edge of a plate. It has worked all right, but with certain foods it is simply impossible...how can you slice a tomato with a plate? How can you peel stuff? I miss the knife...