In a small bowl, combine soy sauce, sesame oil, peanut butter, and chili-garlic sauce. Set aside.
For the rice, bring 2½ cups water to a boil in a saucepot and add rice, salt and butter. Return to a boil and reduce heat to low. Cover and simmer 20 minutes. Remove from heat and let stand covered for 5 minutes.
In a wok, heat 2-3 cups water to boiling and blanch carrots, broccoli, and celery for 2 minutes. Drain and set aside. Rinse and dry the wok.
In the same wok, heat grapeseed oil over medium-high heat and sauté onion until translucent.
Add blanched carrots, broccoli, and celery, plus snow peas, bell pepper and diced pineapple (reserve the pineapple slices). Stir in the sauce mixture.
Cook vegetables until tender, stirring frequently.
Lay pineapple slices on serving plates. Top with rice, then with stir-fried vegetables. Sprinkle with parsley.