Cook rice first, then fry pineapple and various veggies (onions, carrots, peas, bell pepper, and other stuff works) and also spices if you want (garlic is good I guess?) in a tablespoon or two of oil or soy sauce. Optional to add fully-cooked meat at this point as well. Once veggies/meat is fried, add in rice and cook until warm or allow to slightly burn and then turn over a few times to make it crunchier