Carne Asada with orange juice marinade

1 20 oz sirloin steak
2 Tablespoons vegetable oil
1/2 teaspoon dried leaf oregano, crushed
1/2 teaspoon salt
1/4 teaspoon pepper
1/4 cup orange juice
1 Tablespoon lime juice
2 teaspoons cider vinegar
2 oranges sliced 1/2" thick

Place steak in shallow glass baking dish. Rub with oil on each side.

Sprinkle with oregano, salt and pepper.  Spinkle orange juice, lime juice, and vinegar over the steak.  Cover and refrigerate overnight for best flavor or several hours, turning occasionally.

To cook, bring meat to room temperature.  Prepare and preheat grill.  Drain meat, reserving marinade.  Place steak on grill.  Top with orange slices.

Occasionally spoon reserved marinade over steaks as they cook.  Grill 3-4 minutes on each side, or until medium-rare.  Cook longer if desired.

Remove orange slices to turn steak.  Replace orange slices on top of steak.