Toast pecans on baking sheet for 10 minutes at 300°F. Combine all ingredients, except pecans and vanilla, in small pan. Cook about 5 minutes (until syrup spins a small thread). Remove from heat and add pecans and vanilla. Stir quickly until syrup crystallizes. Pour onto buttered platter. Separate nuts rapidly (but gently) and cool before serving. (To add Easter appeal, wrap individual handfuls of pecans in spring-colored plastic wrap and tie with ribbon).