In a large slow cooker, add squash, coconut milk, water, honey, curry paste, ginger, garlic, salt and chicken. Cover and cook on low for 8 hours on low, or 4 hours on high.
Remove chicken and shred with a fork. Use an immersion blender to blend the remaining soup until smooth.
Stir in chicken, bell peppers and spinach. Cover and cook for an additional 5-10 minutes, until spinach wilts and bell peppers soften. Serve hot with cilantro, cashews and fresh lime juice.