Are you OK with eating white potatoes? White-rice-based dishes too are good for a growing lad.
Chowder's a very nutritious dish - it's a milk-based stew with celery and onion fried in butter, chilli powder, smoked fish, white potatoes, and optional various other seafood, fresh herbs, veggies and some bacon. I can give you a basic recipe if you are interested. It's fun and easy to experiment with.
Other versatile basic recipes that I would recommend are Italian risotto and Spanish paella.
F 5 ft 3. HW: 196 lbs. Primal SW (May 2011): 182 lbs (42% BF)... W June '12: 160 lbs (29% BF) (UK size 12, US size 8). GW: ~24% BF - have ditched the scales til I fit into a pair of UK size 10 bootcut jeans. Currently aligning towards 'The Perfect Health Diet' having swapped some fat for potatoes.