The Nature Patties resemble Krabby Patties, except they are made of various inedible things found in the forest, such as leaves, twigs, dirt, coral, stones, different plants, bugs, mushrooms, and worms.
Role in episode
SpongeBob serves the Nature Patties to Mr. Krabs, Squidward, and Patrick for them to eat instead of the last Krabby Patty they have saved for the Food Con. Patrick appears to enjoy the Nature Patties but Mr. Krabs and Squidward show great disgust for them.
Later in the episode, a Nature Patty is unintentionally given to the mayor for the Food Con as Mr. Krabs, Squidward, and Patrick somehow switch one with the real Krabby Patty. Fortunately, the mayor enjoys the Nature Patty and gives the award to them.