Carrot Steamed Buns

Name: Carrot Steamed Buns
Ingredients: 1 cup warm water; 2 1/4 teaspoons active dry yeast; 6 tablespoons plus 1 teaspoon sugar; 2 cups all-purpose flour, plus more for dusting; 1 cup cake flour; 3/4 teaspoon kosher salt; 2 tablespoons canola oil, plus more for the bowl; 1 1/4 pounds carrots (5 to 7 large), chopped into 1/2-inch pieces; 1 tablespoon canola or olive oil; 1/2 teaspoon kosher salt; 6 tablespoons teriyaki sauce, plus more for serving; 1/4 cup salted roasted peanuts, plus more for topping; 1 tablespoon rice vinegar; 6 scallions, minced, plus more for topping; Sriracha, for drizzling