Cook the rice according to package instructions using 2 cups of water.
In a large skillet or wok, heat 1 tablespoon of vegetable oil over medium-high heat.
Add the chicken to the skillet and cook until browned and cooked through, about 5-7 minutes. Remove the chicken from the skillet and set aside.
In the same skillet, add the remaining 1 tablespoon of vegetable oil.
Add the diced onion and minced garlic to the skillet and cook until the onion is translucent, about 3-4 minutes.
Add the pineapple chunks, grated ginger, and soy sauce to the skillet. Cook for an additional 2 minutes.
Add the cooked chicken back to the skillet and stir to combine with the pineapple mixture.
Serve the chicken and pineapple mixture over the cooked jasmine rice.
Garnish with fresh cilantro leaves, if desired.