If you are looking for calories, I know it may "seem" like a lot of food, but simply chow down.
Double your oatmeal intake, and make sure to throw on a scoop or two of Grow!
Have a pound of hamburger for dinner.
Eat a tub of cottage cheese before bed, again with a scoop or two of Grow! Maybe add some olive oil and/or natural peanut butter.
Snack on some walnuts and almonds during the day.
You should have no trouble getting calories when you have a P+F meal, as fattier meats or fatty foods contain a lot of calories.
Although I didn't mention them, don't forget your fruits and veggies in there too.