Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   4      pounds        tri-tip or skirt steak -- sliced 1/4" thick
   6                    limes -- juice of
   6                    fresh jalapenos
   4      tablespoons   Mexican oregano -- crushed
   1      quart         beer (I like Tecate Beer)

Preparation:

Put all the ingredients in a blender jar and blend. Pour marinade over meat so that all of it is covered. You can do this in a glass bowl or in a 2 gallon Ziploc bag. Let the meat marinate in the refrigerator at least 6 hours, preferably overnight. Drain meat and grill over hot charcoal, with direct heat method, for about 5 minutes per side. Serve with warm flour tortillas and sautéed onions and green and red bell pepper slices. Top with red or green taco sauce or tomatillo salsa and guacamole.