1Preheat the oven to 350°F (175°C).
In a bowl, mix the shredded chicken with the teriyaki sauce until well coated.
Prepare the tempura batter mix according to the package instructions.
Heat oil in a deep fryer or large saucepan to 350°F (175°C).
Dip the teriyaki-coated chicken into the tempura batter, ensuring each piece is well coated.
Fry the battered chicken in the hot oil until golden brown and crispy, about 3-4 minutes. Remove and drain on paper towels.
In a small bowl, mix the avocado slices with the lemon juice to prevent browning.
Warm the taco shells in the preheated oven for about 5 minutes.
Assemble the tacos by placing a few pieces of tempura chicken in each taco shell.
Top with avocado slices, a sprinkle of sesame seeds, a pinch of chili powder, and a dash of cayenne pepper.
Serve immediately and enjoy your Teriyaki Chicken Tempura Tacos!