Gluten Free Pani Popo (Polynesian Coconut Rolls)

Ingredients

• 1/2 cup warm water (110-115°F)
• 1 (0.25oz) package (7g) or 2 1/4 teaspoons Red Star Active Dry Yeast
• 1 cup coconut milk
• 6 tablespoons pure vegetable shortening
• 1/3 cup plus 1/4 teaspoon granulated sugar, divided
• 1 1/2 teaspoons sea salt
• 4 large eggs (lightly beaten)
• 4 cups gluten free all-purpose flour, divided
• Rice flour or gluten-free all-purpose flour (for shaping rolls)
• 1 1/4 cups coconut milk
• 1/2 cup granulated sugar
• 1 1/2 teaspoons cornstarch (optional)
• 1/2 teaspoon vanilla paste
• A generous pinch of salt
• Toasted shredded coconut (optional)