In a large skillet, add salted butter, chicken, and yellow onion. Set the skillet over medium-high heat. Cook the chicken until golden, about three to five minutes.
Add garlic, smoked paprika, ground cumin, chili powder, season with salt, black pepper, and chili flakes. Cook for an additional two minutes, stirring frequently.
Mix in harissa sauce and honey. Stir well.
Reduce heat to low, add canned coconut milk. Simmer for about five minutes.
In a bowl, combine pomegranate arils, mixed herbs, feta cheese, lemon juice, and toasted sesame seeds.
Serve the Harissa Butter Chicken over bowls of steamed rice and top with the pomegranate herb mixture.