In a bowl, mix milk and sugar, heat in micro for 40 secs, stir to combine, then stir in yeast. Let stand until bubbly.
In another bowl, mix flour and salt. Add in oil, paste, yeast mixture and egg white. Knead.
Cover with cling wrap for an H
Divide dough @100 each, flatten, and spoon Nutella in center. Seam to seal.
In a bowl, mix yolk and water, then brush it on buns.
Preheat oven to 375 F
In a bowl, mix flour, yolk mixture leftover (1 tbsp) and enough water, to make a paste. Spoon mixture into ziplock and snip the corner. Pipe mixture as cross, onto buns
Bake buns for 20-22 mins