Orechovnik - Slovak Nut Roll - A sweet bread with nut filling

Ingredients

• 1 tsp dry yeast (4 g)
• 1/2 cup milk (lukewarm - 125 ml)
• 3 tbsp vanilla sugar
• 2 cups all-purpose flour (250 g)
• 2 tsp baking powder (16 g)
• 2 tbsp oil (10 ml + extra for brushing)
• water (as needed)
• 3 cups walnuts (300 g)
• 3/4 cup sugar (150 g)
• milk (as needed)