Beat 3 egg yolks and 90 g honey with a hand mixer for 2-3 minutes until frothy. Mix in 250 g mascarpone until smooth. Chill.
Place 80 g pine nuts in an ovenproof pan and roast over medium heat for 5-8 minutes until golden brown, stirring occasionally.
In a separate pan, melt 2 tablespoon butter over medium heat for 1-2 minutes until foaming.
Peel 4 bananas and add them to the pan with 1 sprig rosemary.
Sprinkle 3 tablespoon vanilla sugar over the bananas and caramelize over medium heat for 5-8 minutes, turning occasionally. Optionally add rum. If the pan is dry, add a little water.
Serve the caramelized bananas with the chilled honey mascarpone cream and garnish with rosemary.