I love rice but I do want to eat healthy so I figured I could add veggies to it to increase my fiber intake. I do have a basic rice cooker with just warm and cook options.

let's say I make 2 cups of rice, I use the 1:1 ratio. but if I add 1 cup veggies, do i add another 1 cup as the veggies? or just leave at the same way at 2 cups water + 2 cups rice + 1 cup veggies?