Cook the rice according to the package directions.
If using raw chicken breasts, see the note below and cook them now.
Cook:
Heat the oil in a large pan over medium-high heat. Add the chopped onions and sauté them for 2 to 3 minutes, until they're soft and translucent.
Add the jar of Thai kitchen red curry paste and the coconut milk. Stir to dissolve the curry paste into the liquid. Bring it to a low simmer, add the cooked chicken to the pan, and mix to combine. Reduce the heat to low and simmer for 5 minutes, until the chicken is heated through.
Serve:
Make a bed of rice and top with some of the chicken curry.
Notes
Swap the rotisserie chicken for 2 chicken breasts, cubed. Sauté them for 5 to 7 minutes, until the pieces are golden and the chicken is cooked. Remove from the pan onto a plate and add them back into the sauce
Adding a 12 ounce bag of steamed broccoli turns this chicken curry into a complete meal without extra work. Add it into the sauce when the chicken is simmering or served on the side.