Mix warm plant-based milk with sugar and yeast. Let foam. Combine flour blend, psyllium husk, and salt. Add yeast mixture and melted vegan butter. Mix until smooth. Rest dough briefly. Roll dough between parchment sheets. Spread filling evenly. Roll and slice. Place in baking dish. Bake at 350°F for 25–30 minutes until lightly golden. Mix icing ingredients and drizzle over warm rolls.