Ingredients:
Flank Steak

For marinade:
Juice of Lemon
Zest of Lemon
Juice of Lime
Zest of Lime
1 Serrano Pepper
¼ cup Soy Sauce
¼ cup Fish Sauce
2 cloves Garlic
1 Green Onion
2 teaspoons ground Coriander
Handful of Cilantro
3 tablespoons dark Brown Sugar

Place all of the ingredients for the marinade in a food processor and blend until smooth.

Slice flank steak across the grain into thin strips.

Place the slices of flank steak in a bag along with the marinade. Marinate for a few hours.

Weave the strips of beef onto some skewers.

They should cook up very fast.