String Beans Vinaigrette

Ingredients

• 1 pound green beans, washed, ends snipped off and sliced on the diagonal
• 1/2 medium onion, chopped fine
• 1 small clove garlic, chopped fine
• 13 cup freshly grated Parmesan cheese
• 6 tablespoons olive oil
• 2 tablespoons tarragon vinegar
• 1/2 teaspoon salt
• Freshly ground pepper
• 2 medium tomatoes, sliced in wedges
• 13 cup black olive