Combine lemon juice, vinegar, powdered ginger, salt, sugar, and ground black pepper in a bowl. Stir.
Juice from 2 lemons, 2 tablespoons white or cane vinegar, ¼ teaspoon powdered ginger, ½ teaspoon sugar, ½ teaspoon salt, ¼ teaspoon ground black pepper
Add the cubed tuna. Cover the bowl and then marinate for at least 30 minutes. Note: the longer you marinate the better it gets.
6 ounces fresh tuna steak
Add the grilled pork belly, green and red chili peppers, and onion. Toss.
1/2 lb. grilled pork belly, 2 pieces green chili pepper, 6 pieces red chili pepper, 1 medium red onion
Serve immediately or let the mixture marinate longer before serving.