Should you drain the water from the peas?
This question references CHOW's Easy Spinach Dal (Dhal, Dhall) recipe.
I think the picture is a little misleading but of course you may serve it/consume it anyway you want.
I have had dals so thin they could be consumed through a straw and sometimes thick enough to be finished off with just a fork. Can't recall ever having one served on rice, though some diners do eat them that way.
I have seen restaurants where the Indian diners will pour the dal over the rice making a sort of rice soup on the plate or tray and use the bread to help scoop it into a spoon to consume - then ask for more rice.
Make it as soupy as you like and serve it to your own taste, separate or on rice.