Green Tomato Pie Recipe

Ingredients

• 1-1/2 cups sugar
• 5 tablespoons all-purpose flour
• 1 teaspoon ground cinnamon
• Pinch salt
• 3 cups thinly sliced green tomatoes (4 to 5 medium)
• 1 tablespoon cider vinegar
• Dough for double-crust pie
• 1 tablespoon butter