Finely dice the red bell pepper and yellow onion.
In a non-stick skillet over medium heat, add the ground turkey sausage, breaking it apart with a spatula 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.
In a small bowl, whisk together the whole egg, egg whites, sea salt, black pepper, and garlic powder.
Lower the heat to medium-low and pour the egg mixture into the skillet with the sausage and veggies. Stir gently and constantly until the eggs are fluffy and just set.
Briefly warm the whole wheat tortilla in a separate dry pan or microwave for 10 seconds to make it pliable.
Spread the mashed avocado in the center of the tortilla, then top with the egg and sausage scramble.
Add the fresh salsa over the filling, fold in the sides of the tortilla, and roll tightly into a burrito.
Optional: Place the rolled burrito back in the skillet for 30 seconds per side to lightly crisp the exterior.