- Stir together teriyaki, coconut milk, brown sugar, garlic, and ginger in a measuring cup or bowl. Reserve about ⅔ cup of marinade and set aside.
- Place chicken breasts in a shallow dish and pour marinade over the top. Cover and refrigerate for 30 minutes or up to 4 hours.
- While chicken marinates, pour reserved ⅔ cup of marinade into a saucepan and bring to a simmer over low heat. Simmer until thickened, about 5 minutes, stirring frequently. Pour into a small bowl and cool at room temperature.
- Heat oven to 400ºF and line a baking sheet with parchment paper. Place chicken breasts on baking sheet and place a slice of pineapple on each chicken breast. Bake for 20 minutes.
- Brush chicken and pineapple with ¼ cup of marinade and return to oven for 10 minutes longer, until chicken is cooked through and caramelized on top.
- Remove chicken from oven and serve hot over rice drizzled with remaining sauce. Garnish with chopped cilantro.


