Chicken Khao Soi

INGREDIENTS

• 4 large dried New Mexico or guajillo chiles, stemmed, halved, seeded
• 2 medium shallots, halved
• 8 garlic cloves
• 1 2-inch piece ginger, peeled, sliced
• 1/4 chopped cilantro stems
• 1 ground coriander
• 1 ground turmeric
• 1 curry powder
• 2 vegetable oil
• 2 14-ounce cans unsweetened coconut milk
• 2 low-sodium chicken broth
• 1 1/2 skinless, boneless chicken thighs, halved lengthwise
• 1 Chinese egg noodles
• 3 (or more) fish sauce (such as nam pla or nuoc nam)
• 1 (packed) palm sugar or light brown sugar
• Kosher salt
• Sliced red onion, bean sprouts, cilantro sprigs, crispy fried onions or shallots, chili oil, and lime wedges (for serving)