Lightly caramelize the hazelnuts and sugar in a non-stick pan. Let cool down. Roughly chop the banana chips.
Mix the flour, oatmeal, baking powder and salt together. Beat the honey, butter, 100 g Nutella and the egg until frothy. Stir in the flour mixture, 3/4 of the caramelized hazelnuts and the banana chips. Cut off small piles of dough with a teaspoon and place on two baking sheets lined with baking paper.
Bake one after the other in the preheated oven (top / bottom heat: 180 ° C, fan: 160 ° C, gas: level 3) for 8 - 13 minutes until crispy.
Cool on a wire rack. Garnish with the rest of the melted nut nougat cream and caramelized hazelnuts.