i'll start.
semi skimmed (half fat milk)
wholemeal bread
oatmeal
sweet potato
wholemeal pasta
baked potato
brown rice
lean steak
chicken
salmon
healthy fats
sweetcorn
peas (both high cal for veg)
brazil nuts, almonds, walnuts, non salted nuts.
lots of water.
grape juice (very high cal for fruit juice)
i think creatine gives u the tools to make a significant difference too.