How about adding in nuts to your salads? Avocado? Chickpeas? Fuller fat dressings and mayonnaise?
Quinoa is also a little bit on the higher side, calorically. You can do lots with that. Lentils too. Sweet potatoes, and regular potatoes can up your calories as well.
cookinglight.com comes to mind with recipes that are on the higher side. Simply because when they give a recipe, their serving sizes are ridiculously tiny and I usually double it. Lots of great recipes there.
And let me just add - that boy I wish I had this *problem*
. I can't fathom it.