I am trying to make a good batch of chicken and rice and lentils. I have soaked 2 # of brown lentils. and all the recipes I find make the lentils seperate and then serve them on top of rice. and they never have chicken.
Each has a different cooking time. Rice will get gummy before lentils are cooked and chicken will be shredded and stringy and really overcooked. Long and short of it you will have a great pot of dog or cat gruel food.