Season chicken breasts to taste on both sides with the lemon pepper seasoning. (I used about 1 tablespoon total.)
Pour melted butter or vegan butter into a 13 x 9-inch baking pan. Add chicken and cover tightly with foil.
Bake for 30 minutes, turning the chicken breasts over once halfway through baking.
Remove chicken from baking pan, transfer to a plate and cover to keep warm. Stir together the chicken broth, rice and salt in the same baking pan and cover tightly. Bake rice for 30 minutes.
Place the chicken breasts on top of the rice, cover again and bake for another 15 minutes. Serve.