2 garlic cloves, minced
1/2 cup olive or canola oil
1/4 cup red wine vinegar
3/4 cup white vinegar
salt to taste
freshly ground black pepper to taste
Place steak in a shallow glass baking dish.
Combine the garlic, oil, vinegars, salt and pepper in a small bowl and mix together well. Pour vinegar mixture over the steak; cover with plastic wrap and refrigerate for 12 to 24 hours. Turn occasionally while marinating.
About an hour before cooking, remove the steak from the refrigerator.
To cook, grill over a hot grill for approximatley 8 to 10 minutes per side or until of desired doneness. May also be cooked under the broiler, if desired.
To serve, cut diagonally across the grain into thin slices.