Lightly brush olive oil on bread slices. Sprinkle salt and toast in a preheated oven to 300°F (150°C) until slightly toasted. Remove from the oven and reserve.
Mix duck prosciutto mango, aji or chili, and cilantro.
Season with vinegar, olive oil, salt and pepper.
Place a spinach leaf on each bread slice and spoon some of the mango and duck mixture on top. Sprinkle chopped basil leaves and drizzle olive oil on top.