Easy Chicken Biryani

Name: Easy Chicken Biryani
Ingredients: 1.5 lbs boneless skinless chicken thighs, cubed; 3/4 cup whole milk yogurt; 2 cloves garlic, minced; 1.5 tsp Pink Himalayan Salt; 1.5 tsp garam masala; 1 tsp ground paprika; 1/2 tsp ground ginger; 1/2 tsp ground turmeric; 1 tbsp fresh lemon juice; 6 tbsp unsalted butter, divided; 1/2 medium yellow onion, thinly sliced; 1 small jalapeno pepper, seeded and sliced (optional); 6 cups fresh riced cauliflower; 1/4 cup fresh cilantro, chopped plus more for garnish