Heat oven to 400°F. Lightly grease a 9x13-inch baking dish.
In the 9x13-inch pan, whisk together the coconut milk, garlic paste, ginger paste, curry powder, red curry paste, coriander, chili powder, salt & pepper (I add ¼ tsp each), lime juice, rice vinegar, and soy sauce until smooth.
Stir in the spinach, then arrange the frozen wontons evenly in the sauce. Press them down gently so they’re mostly coated in sauce.
Bake, uncovered, for 20 minutes.
Remove from the oven, drizzle toasted sesame oil on top, stir gently, and flip the wontons so they’re fully covered in sauce. Taste and adjust for seasoning.
Top with cilantro, green onions, sesame seeds, and a good drizzle of chili crunch. Serve immediately as-is or over rice.
