Wash the chicken fillets and pat them dry. Season fillets with salt, pepper and paprika powder. Heat oil in a pan. Fry the fillets for 10-12 minutes, turning them over, then remove and let them cool down.
Peel the mango and cut the flesh from the stone on both sides. Cut 3 mango halves into thin slices. Puree the remaining mango pulp and sour cream and season with salt, pepper and chili flakes.
Wash the cucumber, halve it lengthwise and cut into slices. Cut the chicken filet into thin slices as well. Toast slices and let cool. Spread mango cream on the slices. Alternately cover toasts with mango, chicken and cucumber.
Sprinkle with chili flakes and cut in half diagonally.