Kiwifruit Teriyaki

4 kiwifruit
1/4 cup dry white wine
Soy sauce
1 clove garlic, minced
1 tablespoon vegetable oil (optional)
1 teaspoon grated fresh ginger root or 1/4 teaspoon ground ginger
1 1/2 to 2 pound (1-inch thick) boneless round steak

Pare and pur