Using the same oil, fry the cubed chicken for about 5-7 minutes. Remove and transfer them to a bowl lined with paper towel. Cover once cooled and set aside.
Mix the spices, then add about 1 tbsp. of the spice onto the chicken and mix, 1 tbsp. onto the potatoes, 1 tsp. onto mushrooms, and 1 tbsp. onto the onions. Gently mix with hand or spoon.
In a large platter, add the rice and spread all over the platter. Top with a layer of the cubed chicken, potatoes, mushrooms, then garnish all around with the onions. Top with the halved boiled eggs all over.