Heat olive oil in a non-stick skillet over medium-high heat.
Add ground turkey, breaking it up with a spatula, and cook until browned and cooked through.
Toss in the diced bell peppers and red onion, sautéing until the vegetables are tender-crisp.
In a small bowl, whisk together the whole egg, egg whites, sea salt, black pepper, and garlic powder.
Lower the heat to medium and pour the egg mixture into the skillet with the turkey and vegetables.
Gently scramble the eggs until just set, ensuring they remain moist and fluffy.
Warm the tortilla in a separate dry pan or microwave for 10 seconds until pliable.
Place the turkey and egg scramble in the center of the tortilla, top with sliced avocado, and roll tightly into a burrito.