Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1 1/2  pounds        beef tri-tip -- up to 2
                        ***MARINADE***
   6                    limes juice of -- (about 3/4 cups)
     1/4  cup           olive oil
   1      teaspoon      cumin
     1/2  teaspoon      garlic powder
     1/2  teaspoon      onion powder
                        ***RUB***
   2      tablespoons   coarse grind black pepper
   1      tablespoon    kosher salt

Preparation:

Trim the fat from the tri-tip. Combine marinade ingredients. Place meat and marinade in covered glass dish or plastic bag. Refrigerate 1 1/2 to 2 hours. Remove meat from marinade, discarding marinade. Combine rub ingredients and press into all surfaces of meat. Seasoned meat may be refrigerated for one hour to enhance flavor or grilled immediately. Grill tri-tip to desired doneness over medium coals for 30 - 40 minutes, turning occasionally. Remove from heat and tent with foil for 10 minutes before carving across the grain into thin slices.