Sous Vide Onion Rings
About
You wouldn't think that sous vide would benefit something like the classic american diner item--onion rings. Read on!
Ingredients
onion, whole, 1 ea.
eggs, 2 ea.
flour, 2 cups, as needed.
breadcrumbs, fine, 4 cups, as needed
grated Pecorino Romano and shaved Romaine, as needed.
Ketchup remains the first choice. Up to one cup/240 ml..
Equipment requirements
Immersion circulator, portable or stationary.
Heat rated container, minimum of 2 gallons/8 liters.
Heat rated sous vide bags.
Infrared or probe thermometer.
Instructions
Serves 2-4 Level of difficulty 2.25
Vacuum seal the onion and process at 183 F/84 C for one hour. Shock to 70F/21C, and refrigerate to 40F/4.5C.
Peel, slice the onion to uniform rings, and separate.The size guideline is thick enough to maintain a little strength, and thin enough to be eaten comfortably.
With dry hands, gently dip, toss and sprinkle with generous amounts of flour. Lay some onions down, sprinkle, shuffle carefully, until they are all dry to the touch.
Leftover flour can be resifted and saved for other breading projects.
Eggs, (2 oz/240 ml each) and 4 oz water. Mix well. 



The hotter the oil, the sooner it will wear out, so I try to work between 300F and 325F. Deep fry the rings until they are golden brown. Sprinkle with the cheese, serve with ketchup or your favorite dipping sauce.