You have been modified to have an oven installed in your abdomen. The oven appears as a double door on your abdomen and is approximately 10 inches wide and 8 inches tall. The double doors opens easily and latch tightly closed as one would expect. There are runes along the inside of the doors, etched into the metal. The outside of the oven always remains at room temperature despite the temperature inside the oven. 

In addition to the installed oven, you have received mastery of the culinary arts through training or magical means, granting you the following benefits:

• Increase your Constitution or Wisdom score by 1, to a maximum of 20.
• You gain proficiency with cook’s utensils if you don’t already have it.
• As part of a short rest, you can cook special food, provided you have ingredients and cook’s utensils on hand. You can prepare enough of this food for a number of creatures equal to 4 + your proficiency bonus. At the end of the short rest, any creature who eats the food and spends one or more Hit Dice to regain hit points regains an extra 1d8 hit points.
• With a half hour of work or when you finish a sentry's rest, you can cook a number of treats equal to your proficiency bonus. These treats could be such as breads, cookies, muffins, doughnuts, cakes, croissants, bagels, or pies. Treats cooked in this way last 8 hours after being made. A creature can use a bonus action to eat one of those treats to gain temporary hit points equal to your proficiency bonus.
• When any uncooked food items are placed inside of the oven and the door is latched, the interior begins to heat up to the appropriate cooking temperature. You instinctively know when the food is cooked perfectly. 
• Due to the oven and your skill, cooking times for other foods are halved.