HEAT 1 tablespoon of butter in a large skillet over medium-high heat, until melted. ADD eggs, and COOK until scrambled, STIRRING occasionally. REMOVE eggs, and TRANSFER to a separate plate.
ADD an additional 1 tablespoon butter to the pan and HEAT until melted. ADD frozen mixed vegetables and onions, and SEASON with a salt and pepper to taste. SAUTE for about 5 minutes or until the onions and vegetables are soft.
INCREASE heat to high, ADD in the remaining 1 tablespoon of butter, and STIR until melted. Immediately ADD the cooked quinoa and soy sauce, and STIR until combined. Continue STIRRING for an additional 3-5 minutes to fry the quinoa. ADD in the cooked eggs and sesame oil, STIR to combine.