Place the chillies, ginger, garlic, coriander seeds, coriander stems, tamarind paste and vegetable oil into a food processor and blend until smooth.
Transfer the spice mixture to a wok over a low-medium heat and cook until it becomes aromatic.
Add the tomatoes and cook for 5-6 minutes.
Add the fish sauce, chicken stock and coconut milk and bring to the boil.
Add the salmon and reduce the heat to simmer for 3-4 minutes.
Add the turkey and noodles and cook until hot and the salmon is cooked through.
To serve, divide the laksa among four deep bowls. Sprinkle with mint leaves, spring onions and garnish with lime wedges.