Oil for stir frying and deep frying
2 lbs sirloin steak cut into ½ inches wide strips
Salt and freshly ground pepper
Pinch ground cumin
1 tsp minced garlic
Red wine vinegar
1 tsp finely chopped aji Amarillo
1 lb red onions sliced
1 lb plum tomatoes, sliced lengthwise in to wedges
6 tbsp soy sauce
2 tbsp freshly chopped cilantro
2 lbs large potatoes, peeled and cut lengthwise
Cooked white rice