Make the Meatballs: In a large bowl, combine ground chicken, egg, breadcrumbs, green onion, cilantro, jalapeño, garlic, ginger, cayenne, salt, pepper, and sesame oil. Mix until just combined. Roll into 1-inch meatballs.
Cook the Meatballs: Heat oil in a large skillet over medium heat. Add meatballs and cook for 5–7 minutes, turning to brown all sides and cook through. Remove and set aside.
Make the Sauce: In the same skillet, stir together coconut milk, peanut butter, soy sauce, and chili paste. Heat until smooth and bubbling.
Add the Veggies: Add carrots, bell pepper, and peas. Sauté for 5 minutes until tender.
Combine: Return meatballs to skillet and toss to coat. Cook another 2–3 minutes until heated through.
Garnish and Serve: Remove from heat and top with chopped peanuts, scallions, cilantro, and hot sauce if desired. Enjoy warm!