Set up grill for direct cooking over medium heat. Oil grate when ready to start cooking.
In a bowl, combine beef strips, pepper stir-fry, oil and taco seasoning. Grill beef and pepper strips on hot oiled grill about 5 minutes total.
Remove pizza crust from package and place on grill. Top with salsa, cheese, beef and pepper strips.
Turn heat down to medium and cook pizza covered for 8 to 10 minutes or until cheese has melted and starts to bubble.
Serve hot garnished with sour cream, guacamole, and cilantro.
INDOOR: Preheat oven to 450 degrees F. Combine and season beef and pepper strips as directed. Heat 2 tablespoons of oil in a large frying pan. When oil is hot, saute beef and pepper strips for 5 minutes. Remove from pan; set aside. Remove pizza crusts from package and top with salsa and cheese. Top with beef and peppers and bake in preheated oven for 8 to 10 minutes or until cheese is melted and begun to bubble. Garnish as directed.