From the Super Mario Wiki
Omelette Meal is an item which appears in Paper Mario: The Thousand-Year Door. It is made by Zess T. at her house by mixing a Mushroom or a Life Shroom with a Mystic Egg. This meal restores five HP and five FP. It can also be obtained by spending the night at the Poshley Heights Hotel. It will be on the table the following morning.
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