Cooking gyutan (cow tongue) in Japan traces it origins to the 1940s in the city of Sendai when a local restauranteur decided to specialize in thinly sliced grilled beef tongue.Unlike the thinly-sliced grilled gyutan that originated in Sendai, cooking gyutan katsu involves more familiar cooking techniques. It requires that the beef tongue be cooked whole before it is sliced, coated in panko and deep fried. The long and slow cooking to tenderize the tongue is how we've been cooking tongue for as long as we have been cooking tongue. The breading and frying part is just like cooking tonkatsu.To simplify cooking, use a slow cooker to tenderize the beef tongue overnight. Cool it the next day before slicing and frying.
- Slow Cooker
- Rinse the beef tongue several times. Pat dry with a kitchen towel. Rub the surface generously with rock salt to remove any sliminess. Rinse and repeat the procedure until the tongue skin no longer feels slimy.
- Place the tongue in the slow cooker and cover with water. Add about two tablespoons salt.
- Set the cooker to LOW and cook the tongue for 10 hours.
- Remove the tongue from the slow cooker and cool on a rack until it reaches room temperature. Wrap in cling film and chill in the fridge for several hours (to make slicing easier and cleaner).
- Take the tongue from the fridge and peel off the skin. If the tongue has been cooked correctly, the skin should come off easily.
- Cut the tongue into slices anywhere from half an inch to an inch. It depends on how thick you pant your gyutan katsu. Take the best four pieces. Wrap and refrigerate the rest for another dish.
- Dump the flour in a shallow bowl. Beat the egg in a second shallow bowl. Spread the panko in a third shallow bowl.
- Dredge each slice of tongue in flour; shake off the excess.
- Dip each floured tongue slice in egg.
- Coat the tongue with panko.
- Heat enough cooking oil in a pan to reach a depth of at least two inches. The temperature you're looking for is around 145F.
- Drop the panko coated tongue slices into the hot oil. If your frying pan is rather small, do the frying in batches so that the tongue slices don't touch one another during frying. Cook until the panko turns crisp and golden. Flip to brown the opposite side.
- Serve your gyutan katsu at once (optionally, drizzled with tonkatsu sauce).
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