Creating Crispy Tempura Shrimp with Dipping Sauce can be straightforward if you follow these simple steps:

1. Prepare the Shrimp: Rinse the shrimp under cold water and pat dry with paper towels.
2. Make the Batter: In a bowl, combine the flour, cornstarch, baking powder, and salt. Gradually add the ice-cold water, mixing until just combined. Do not overmix; a few lumps are fine.
3. Heat the Oil: In a deep skillet or pot, heat vegetable oil over medium-high heat until it reaches 350°F (175°C).
4. Coat the Shrimp: Dip each shrimp into the batter, allowing excess batter to drip off.
5. Fry the Shrimp: Carefully place the battered shrimp into the hot oil, frying in batches to avoid overcrowding. Fry until golden brown, about 2-3 minutes per side.
6. Drain Excess Oil: Use a slotted spoon to remove the shrimp from the oil and transfer them to a paper towel-lined plate to drain excess oil.
7. Prepare the Dipping Sauce: In a small bowl, whisk together soy sauce, rice vinegar, sesame oil, grated ginger, and chopped green onions.
8. Serve: Arrange the crispy shrimp on a serving platter with lemon wedges and the dipping sauce on the side.

Following these steps will guide you in creating this incredible dish effortlessly. The crispy texture and savory flavor will surely impress everyone at your table.