- Chop shrimp into ¼ inch pieces. Blot dry with a paper towel. Heat sesame oil over medium heat in a medium skillet and add cabbage and green onions. Sauté for 3 minutes. Add ginger, garlic and shrimp. Continue to cook for 3 minutes longer. Transfer mixture to a small bowl to cool while preparing dough for dumplings.
- Combine 1 cup gluten-free flour, ½ cup water and salt in a medium mixing bowl and stir to form dough. Dough will be sticky and moist.
- Dust a clean work surface with a few tablespoons of flour and work dough into a ball adding remaining ¼ cup flour as you knead. Place ball of dough back into the bowl and clean hands if necessary. Take about 2 tablespoons of dough and roll into a ball on floured work surface. Dust rolling pin with flour and roll dough thinly. Use a 3 ½ inch round cookie cutter or a glass to cut out dough. Remove the dough around the dumpling wrapper and return it to the bowl.
- Place dumpling wrapper in hand and use fingertips to further press dough thinly. Add a scant tablespoon of filling to the center. If dough is too dry, moisten the perimeter with damp fingertips.
- Gently fold and press the middle to seal. Place onto work surface and crimp edges using a fork. Turn dumpling and crimp the other side. Set completed dumpling on a flour dusted baking pan or tray.
- Once you’ve completed 4 dumplings, heat 2 tablespoons olive oil over medium heat in a skillet for 1 minute. Add dumplings and brown for 3 minutes on each side. Add 2 tablespoons of water to skillet and cover with a lid. Steam for 2-3 minutes longer. Transfer cooked wontons to a serving bowl and sprinkle with sesame seeds. Cover with a towel to keep warm.
- Continue making dumplings in batches of 4. Cover dough with a damp clean towel while making wontons to keep it moist.
- Stir together hoisin sauce and tamari in a small dipping bowl. Serve dumplings warm with dipping sauce.