Grilled Flank Steak With Horseradish Sauce

• 2 lbs flank steaks
• 1 small onion, diced
• 3 garlic cloves, minced
• 12 cup olive oil
• 14 cup white wine vinegar
• 2 tablespoons Worcestershire sauce
• 2 teaspoons sugar
• 1 teaspoon salt
• 1 teaspoon fresh ground pepper
• 1 cup sour cream
• 3 -4 tablespoons prepared horseradish
• 2 tablespoons white wine vinegar
• 1 tablespoon mayonnaise
• 1 tablespoon fresh parsley, chopped
• 12 teaspoon salt
• 12 teaspoon pepper
• 6 cups salad greens

1. Marinade: Stir together onion and remaining ingredients.
2. Fresh lemon juice can be substituted for vinegar.
3. Place steak in a heavy-duty zip-lock bag and add the marinade.
4. Seal bag and chill 8 hours, turning occasionally.
5. Remove steak from marinade and grill, covered with grill lid over medium-high heat 8 to 10 minutes each side or to desired degree of doneness.
6. Cut steak diagonally across the grain into thin strips.
7. Serve over salad greens with Horseradish sauce.
8. Horseradish Sauce: Mix together sour cream and remaining ingredients.

flank steaks, onion, garlic, olive oil, white wine vinegar, worcestershire sauce, sugar, salt, fresh ground pepper, sour cream, white wine vinegar, mayonnaise, fresh parsley, salt, pepper, salad greens

Taken from www.food.com/recipe/grilled-flank-steak-with-horseradish-sauce-188212 (may not work)