Pour the uncooked rice, melted butter, water, and 1 teaspoon of the taco seasoning into a 9 x 13 baking dish. Stir to combine.
Place the butterflied chicken breasts and remaining taco seasoning into a large zip top bag and shake to fully coat.
Lay the seasoned chicken breasts on top of the rice and pour salsa over the top. Tuck the chicken breasts into the rice mixture. Cover with foil.
Bake for 45 minutes. After 45 minutes, open, sprinkle with cheese, recover, and bake for an additional 10-15 minutes. Open and test rice to make sure it's tender. If not, bake an additional 10-15 minutes.