1 Japanese yam or sweet potato, sliced 1/4 inch thick
vegetable oil, for frying
green onions, sliced into slants for garnish
Instructions
Add the oil to a large wok for deep frying and start to preheat.
Prepare all the vegetables or seafood beforehand prior to making the tempura batter. Refrigerate until ready to fry.
In a bowl measure the egg whites and ice cold water. Mix well. In a separate bowl, mix rice flour, baking powder, and salt.
Gradually add the dry ingredients to the wet mixture, stirring gently until just combined. The batter should be slightly lumpy; do not over-mix. This is the recommended method. Alternatively, it is also possible to mix the wet mixture with the dry ingredients, although this will likely result in a much smoother texture in the batter which is undesirable for tempura.
Maintain the oil temperature between 170°C to 180°C (340°F to 360°F) for optimal frying.
Fry in small batches to avoid lowering the oil temperature too much and to ensure even cooking.
Serve the tempura immediately while it’s hot and crispy.
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