Fresh potato

 is a food item found in Fallout 3 and Fallout: New Vegas.

Characteristics
It can restore some of your hit points without irradiating you. It is one of the few edible food items that doesn't give you any radiation, besides other fresh fruits or vegetables, and food found in a non-compromised vault.

Additionally, in Fallout: New Vegas it can reduce Starvation and Dehydration during hardcore mode. It can also be used in the recipe to make "Cook-Cook's Fiend Stew".

Fallout 3

 * One can be found in Pinkerton's Lab, in the broken bow of Rivet City.
 * Ten are in the Rivet City Science Lab, though taking them is considered stealing except one.

Fallout: New Vegas

 * Sold by Westside Co-op
 * Sold by Boomer chef
 * Sold by William Farber
 * 11 are Found in Boomers mess hall