Heat broiler. Stir together mayo and curry. Combine Turkey, 2 tablespoons of curry-may, feta and ¼ teaspoon of salt.
Shape into Four 1/2 -inch thick patties. Broil 4 inches from heat 11 to 13 minutes; turn once. Drizzle olive oil on the naan bread and either heat in pan or under broiler just for a few minutes. Spread remaining curry-mayo on naan. Layer patties, onion, spinach, tomatoes and feta.