Heat oil in 5 qt Dutch oven over medium high heat. Sprinkle pork with salt & pepper. Saute pork in batches for 4 minutes or until browned. Remove to paper toweling to drain. Reduce heat to medium. Add onions, peppers and more oil if needed; saute 8-10 minutes or until onions are slightly golden. Whisk flour, cinnamon, nutmeg and allspice into broth until smooth. Add to pot along with nectar and pork. Cover; simmer 8 minutes. Add peaches; cook 4 minutes or until pork and peaches are tender.