Dice the red bell pepper and yellow onion into small, uniform pieces.
Heat the avocado oil in a non-stick skillet over medium-high heat.
Add the ground chorizo to the pan, breaking it apart with a spatula until browned and cooked through.
Toss in the diced peppers and onions, sautéing until they are tender and slightly caramelized.
In a small bowl, whisk together the whole egg, egg whites, sea salt, and black pepper.
Lower the skillet heat to medium and pour the egg mixture over the chorizo and vegetables.
Gently fold the eggs with a spatula until they are just set and fluffy.
Warm the whole wheat tortilla in a separate dry pan for 30 seconds per side until soft and pliable.
Place the chorizo and egg scramble in the center of the tortilla and garnish with fresh cilantro.
Fold in the sides of the tortilla and roll tightly to form a burrito before serving.