Scrub the potato and dice into small 1/4-inch cubes to ensure they cook quickly and evenly.
Heat the olive oil in a non-stick skillet over medium-high heat, then add the diced potatoes and a pinch of sea salt.
Sauté the potatoes for 8-10 minutes, stirring occasionally, until they are tender and develop a crispy golden exterior.
Add the ground turkey sausage, diced bell pepper, and red onion to the pan, breaking up the meat with a spatula until fully browned.
In a small bowl, whisk together the large egg, egg whites, garlic powder, and black pepper until the mixture is well combined.
Lower the heat to medium and pour the egg mixture over the sausage and potatoes, gently folding with a spatula until the eggs are fluffy and just set.
Sprinkle the shredded cheddar cheese over the filling and allow it to melt slightly before removing the skillet from the heat.
Briefly warm the whole wheat tortilla in a separate dry pan, then pile the filling into the center, fold in the sides, and roll tightly into a burrito.