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This Spring Onion Tempura with Ponzu Dipping Sauce is a light and flavorful vegan starter featuring golden, crispy tempura-battered spring onions served with a zesty, umami-rich ponzu sauce. Perfect for spring gatherings, this dish delivers crunch, citrus, and savor in every bite.
5 from 2 votes
Prep Time 15 minutes
Cook Time 15 minutes
Total Time 30 minutes
Course Appetizer, Snack
Cuisine Japanese
Servings 4
Calories 250 kcal

Ingredients
  

For the Spring Onion Tempura:

  • 8 –10 spring onions scallions, trimmed and halved lengthwise if thick
  • 100 g ¾ cup all-purpose flour
  • 2 tbsp cornstarch
  • 1/2 tsp salt
  • 180 ml ¾ cup ice-cold sparkling water
  • Vegetable oil for frying

For the Vegan Ponzu Dipping Sauce:

  • 3 tbsp soy sauce
  • 1 tbsp rice vinegar
  • 1 tbsp lemon juice
  • 1 tbsp orange juice or yuzu, if available
  • 1 tsp maple syrup or agave
  • 1 tsp grated ginger optional

Instructions
 

  • Prepare the Ponzu Sauce: In a small bowl, mix soy sauce, rice vinegar, lemon juice, orange juice, maple syrup, and optional ginger.
  • Set aside to let the flavors meld.
  • Make the Tempura Batter: In a mixing bowl, whisk flour, cornstarch, and salt together.
  • Add ice-cold sparkling water and stir briefly—don’t overmix; a few lumps are okay.
  • Heat the Oil: In a deep pan, heat oil to 170–180°C (340–355°F).
  • Test by dropping a bit of batter in—if it sizzles and rises, it's ready.
  • Fry the Spring Onions: Dip each spring onion into the batter and carefully lower into the oil.
  • Fry in batches for 2–3 minutes, until lightly golden and crisp.
  • Transfer to a paper towel-lined plate to drain excess oil.
  • Serve: Plate the crispy spring onion tempura with a small dish of ponzu sauce on the side for dipping. Garnish with sesame seeds or chopped chives if desired.

Notes

  • Keep the batter cold and fry in small batches for the crispiest result.
  • Other veggies like zucchini or sweet potato can be added to the mix.
  • For a gluten-free version, use rice flour and tamari.
Keyword vegan tempura