Finely dice the red bell pepper and yellow onion into uniform pieces.
In a small bowl, whisk together the egg whites, whole egg, sea salt, black pepper, and garlic powder until well combined.
Heat the avocado oil in a non-stick skillet over medium-high heat.
Add the ground turkey sausage to the skillet, breaking it apart with a spatula, and cook until browned and cooked through.
Add the diced peppers and onions to the skillet with the sausage, sautéing for 3-4 minutes until the vegetables are tender-crisp.
Reduce the heat to medium-low and pour the egg mixture over the sausage and vegetables.
Gently fold the eggs with a spatula until they are just set and fluffy.
In a separate dry pan or over an open flame, lightly warm the whole wheat tortilla for 30 seconds per side until pliable.
Place the egg and sausage mixture in the center of the tortilla, fold in the sides, and roll tightly into a burrito.
Optional: Place the rolled burrito back in the skillet for 30 seconds to sear the seam shut.