Place chicken, garlic, ginger, red onions, spring onions, coriander leaves, soy sauce, black pepper and oil in a bowl. Season with salt. Mix.
Place one teaspoon of chicken mixture on the center of each wrapper. Brush edges with a little water. Fold and pleat edges to enclose the filling. (Watch video above for pleat design ideas). Place prepared momos on a tray lined with baking paper.
Place momos in a steamer lined with baking (parchment) paper. Cook, in batches, for 15-20 minutes or until cooked through. Transfer to a plate. Cover to keep warm. Serve with momos chutney or sweet chili sauce.