Beat stiff 2 egg whites, slowly add while beating, 3/4 cup sugar, 1 cup chopped pecans, 1 cup chocolate chips, 1 teaspoon vanilla. Preheat oven to 350 degrees, drop by teaspoons on sheet of foil about 1 1/2 inches apart. Place in oven and turn off heat. Leave overnight, DO NOT OPEN OVEN DOOR. Remove from foil and serve.