Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
     1/2  cup           fresh lime juice
     1/2  cup           chopped fresh cilantro
     1/2  cup           olive oil
     1/3  cup           soy sauce
     1/4  cup           tequila
   7                    garlic cloves -- finely chopped
   2      teaspoons     grated lime peel
   2      teaspoons     ground cumin
   2      teaspoons     dried oregano
   1      teaspoon      ground black pepper
   2      2 pound       beef loin tri-tip roasts -- trimmed

Preparation:

Marinate the tri-tip for at least two hours. Whisk first 10 ingredients in medium bowl. Using small sharp knife, pierce meat all over. Place meat in large resealable plastic bag; add marinade. Seal bag. Refrigerate at least 2 hours or overnight, turning plastic bag occasionally. Prepare barbecue (medium-high heat). Remove meat from marinade. Discard marinade. Grill meat to desired doneness, about 10 minutes per side for medium-rare. Transfer to cutting board. Tent with foil; let stand 10 minutes. Cut diagonally across grain. Source: Mike Hammett