Lift heavy, eat heavy.
Can you gain size from eating clean?
30 cans tuna / day should do the trick
you may if lucky natural bodybuilding you will look like a ufc fighter like Saint Pierre if lucky. he's on steroids though.
Train hard(Not lifting heavy, but full stretch and contraction) and eat AS MUCH AS YOU CAN.Simple.and final most important point: the imagination of your ideal physique which is even more real than the reality.
Bodybuilding is the muscle
Did you guys have to bulk or add more calories to become more muscular? Or did you just start to lift heavy and the gains occurred?