Cut whole pineapple in half, then hollow it out. Reserve 1/2 cup of pineapple chunks and 2 tbsp of pineapple juice and store or freeze the rest.
Cook rice according to your preference.
Cut beef in to chunks, then season with garlic powder, white pepper, soy sauce, pineapple juice, baking soda, cornstarch. Mix until well coated, then set aside.
In a small bowl combine oyster sauce, Sriracha, brown sugar, dark and light soy sauce, water or chicken broth and pineapple juice. Mix until well combined then set aside. In a mortar and pestle, mash garlic cloves and Thai chilis to create a paste.
Add oil to a large skillet or wok, over medium high heat. Shallow fry the steak bites for 3-5 minutes or until desired doneness. Remove from the pan, reduce heat then sautè Thai garlic paste until fragrant about 1 minute. Next, add in peppers and onions. Sautè for about 3 minutes moving the veggies around continuously with a spatula.
Add in the pineapple chunks and stir fry for an additional 2 minutes. Add back the beef, and pour in the sauce. Reduce heat, allow the sauce to thicken and toss until the beef and veggies are coated.
Add a drop of olive oil to a small bowl. Scoop rice into the bowl and press/pack it down. Take the pineapple or plate and flip the bowl of rice until it comes out in a molded uniform shape. Spoon on the beef, top with green onions and sesame seeds if desired. Enjoy!!