Start by rinsing your chicken wings under cold water. Pat them dry with paper towels to remove excess moisture.
In a large frying pan or deep fryer, heat enough vegetable or canola oil to submerge the wings to 350°F (175°C).
In a medium saucepan, heat the 2 tablespoons of vegetable oil over medium heat. Add the chopped garlic and minced ginger, sautéing until fragrant (about 1-2 minutes).
Stir in the sugar, soy sauce, seasoned rice vinegar, and chili garlic sauce. Mix well and bring the mixture to a simmer.
In a small bowl, mix 2 tablespoons of cornstarch with 3 tablespoons of water to create a slurry. Gradually add this to the simmering sauce while stirring continuously. Allow it to thicken for about 2-3 minutes, then remove from heat and stir in the lemon juice.
Carefully add the wings to the hot oil in batches, frying for approximately 8-10 minutes, or until golden brown and crispy. Use a meat thermometer to ensure the internal temperature reaches 165°F (75°C).
Once the wings are cooked, transfer them to a large bowl. Pour the prepared sauce over the wings and toss until evenly coated.
Plate the wings on a serving platter and sprinkle with sesame seeds or sliced green onions if desired. Serve hot.