Place halved bananas in heavy base saucepan on medium heat with butter and brown sugar. Keep tossing till bananas are cooked.
To make cheesecake base:
Place half sugar and rest of ingredients in blender and blend till combined.
In another bowl, place rest of sugar and egg whites. Whisk till stiff peak is reached. Mix into ricotta base then fold through crushed caramelised banana.
To make Nutella ice cream:
Place all ingredients in bowl, whisk till combined. Gradually add dry ice till mixture is frozen. Scoop out and allow to rest in freezer for a couple of hours to allow remaining gas to settle.
To make Nutella soil:
Mix Nutella and maltodextrin together in bowl (may need extra maltodextrin to get desired texture).
Roll out dough ball. Spread on cheesecake/caramelised banana mixture and bake. Once cooked, slice and place scoop of Nutella ice cream in center of pizza. Sprinkle with Nutella soil, mint and dust with icing sugar.