Place a pan on medium-high heat; pour 1 Tbsp oil. Add in sliced mushrooms and let it saute for 5 mins. Add in chopped bell pepper, salt and ½ Tbsp pepper. Saute for another 2 mins; set aside.
In the same pan on medium-high heat add in the remaining oil. Add cubed chicken and saute for 5 mins before adding in salt, pepper, minced garlic. 10 mins into cooking add in soy sauce, chili garlic sauce, water. Cover and let it cook. In the last 2-3 minutes of cooking add in the cornstarch slurry. Mix well and it’s ready to serve.
While the chicken cooks; place a separate small pan on high heat. Toss cubed pineapple with cinnamon to coat each piece completely. Space out the cubes and add to the pan and let it cook flipping it halfway through till you a charred layer on each side.
SERVING:
In a bowl; add rice(see notes above for flavoring) and then add cooked chicken, pineapples, mushrooms and bell pepper. I space them out and add everything adjacent to each other rather than layering on top but its totally as you prefer. Drizzle the sauce from chicken on top of veggies and rice as well. Top with some fresh spring onions(green part) and/or with optional toppings. Serve Immediately!