By Dave DeWitt and Nancy Gerlach Recipes: Spicy Sweet Potato Soup Gallo Pinto Avocado Herb Omelet with Hot Chutney La Junta Jalapeño Steaks Picadillo de Chayote Cinnamon-Spiced Dessert Plantains with Natilla Cream In September, 1992, your editors joined forces once again to invade a Central American country–ostensibly for a vacation, and this time Costa Rica was the target. …