Finely dice the red bell pepper and onion into uniform pieces.
In a non-stick skillet over medium heat, cook the ground turkey sausage until browned and cooked through, breaking it into small crumbles with a spatula.
Add the diced peppers and onions to the skillet with the sausage, sautéing for 3-4 minutes until the vegetables are tender and fragrant.
Pour the liquid egg whites into the pan, seasoning with garlic powder, sea salt, and black pepper, then scramble until just set and no longer liquid.
Stir in the baby spinach at the very end, allowing it to wilt from the residual heat of the eggs and sausage.
Warm the whole wheat tortilla in a separate dry pan for 30 seconds per side until soft and pliable.
Spread the sliced avocado and fresh salsa down the center of the tortilla, top with the sausage and egg mixture, then tuck the sides and roll tightly.
Optional: Place the rolled burrito back in the skillet for 1 minute to create a golden, crispy exterior before serving.