Boil frozen wontons for 4–5 minutes. Add bok choy during the final minute. Drain and divide between bowls.
Heat oil and cook shallots, garlic, and ginger for 1–2 minutes until fragrant.
Stir in red curry paste and chili oil. Cook for 30–60 seconds to deepen the flavor.
Add chicken broth and coconut milk, stirring until smooth.
Add brown sugar, fish sauce, lime juice, and salt. Gently simmer for 3–4 minutes.
Pour the hot Thai curry broth over the wontons and bok choy. Finish with crispy shallots, green onion, and cilantro.
