Heat a large pot or dutch oven over medium/high heat and add the olive oil and minced garlic.
When the olive oil is fragrant, add the sweet potatoes, carrots, onion, and salt to the pot and sauté for 5-7 minutes. Stir periodically.
Add in the curry paste, chili sauce, sriracha, uncooked quinoa, 4 cups of broth, and coconut milk. Mix together until combined.
After the ingredients are combined, add the ground turmeric, ground ginger, salt, chicken, and lemongrass to the pot and mix well. Make sure that the chicken is submerged in liquid. Bring to a boil over high heat.
Once boiling, reduce the heat to low and cover the pot. Let the soup simmer on low for 30 minutes, stirring halfway through.
After 30 minutes, remove the chicken from the pot and place it on a cutting board. Add the last two cups of broth. Mix well and cover the pot.
Shred the chicken with two forks and add it back into the soup. Mix in the sliced green pepper.
Let soup simmer for an additional 5-10 minutes. Add in the lime juice and fresh herbs right before serving.