In a food processor or blender, combine the soaked dried chilies, fresh red chilies, garlic, ginger, shallots, shrimp paste, ground coriander, ground turmeric, ground cumin, and tamarind paste mixed with water.
Blend until you get a smooth paste. Add a little water if necessary to help with blending.
In a large wok or skillet, heat the vegetable oil over medium heat.
Add the mee siam paste and cook, stirring frequently, until fragrant and the oil begins to separate from the paste, about 5-7 minutes.
Add the shrimp and tofu cubes to the wok with the paste.
Stir-fry until the shrimp turn pink and are cooked through, and the tofu is heated through, about 3-4 minutes.
Add the soaked and drained rice vermicelli to the wok.
Pour in the chicken broth or water, soy sauce, fish sauce, sugar, and the additional tamarind paste mixed with water.
Toss everything together until the noodles are well coated with the sauce and heated through.
Add the bean sprouts and chives or green onions to the wok.
Stir-fry for another 2-3 minutes until the vegetables are tender but still crisp.
Transfer the mee siam to serving plates.
Top with the thinly sliced omelette strips.
Garnish with fresh chopped cilantro.
Enjoy your meal!