Season raw shrimp with Ancho Seasoning and grill in skillet over medium heat until ~ ¾ cooked, about 4-5 mins. Set aside.
Heat the sesame oil in a deep non-stick sauté pan over medium-high heat. Add the yellow onion and cook, stirring often, until it becomes soft and translucent, 3-4 mins. Add the garlic and continue to stir.
Add the frozen vegetables continuing to stir until the vegetables start to soften.
Move the vegetable mixture to one side of the pan. On the other side of the pan, add the beaten eggs and cook. Stir constantly until they are scrambled, ~2 mins. Once eggs are scrambled, mix with vegetables.
Add the cauliflower rice, shrimp, and sauce. Cook, stirring constantly, until the cauliflower rice softens, 3-4 mins. Turn off the heat and stir in the green onions.