Rhubarb Sticky Buns with Vanilla Bean Mascarpone Frosting - Recipe By Me

Ingredients

• 750g rhubarb, trimmed and chopped into 5cm pieces
• 375g granulated sugar
• Pinch of salt
• 1 teaspoon vanilla bean paste
• 2¼ teaspoons active dry yeast
• 240ml whole milk, lukewarm
• 4 tablespoons granulated sugar, divided
• 565g all-purpose flour
• 1 teaspoon salt
• 2 large eggs, at room temperature
• 90g unsalted butter, at room temperature
• 225g mascarpone cheese
• 225g cream cheese, at room temperature
• 100g powdered sugar, sifted