Ingredients

• 6 tablespoons white wine vinegar
• 6 tablespoons vegetable oil
• 1 red onion, thinly sliced
• 1/4 cup white sugar
• 1/4 teaspoon salt
• 2 dashes hot pepper sauce
• 3/4 teaspoon ground black pepper to taste
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• 1/2 cup coarsely chopped walnuts
• 1 head romaine lettuce, torn
• 1 head butter lettuce, torn
• 2 bunches fresh spinach leaves
• 2 pears, cored and sliced
• 1 (4 ounce) package feta cheese