Not reaching my calorie goal

Try adding more calories to breakfast since it is the most important meal of the day... From what I can tell your barely consuming 250 calories for breakfast which you could bump up another 150 calories...For dinner eat what your eating but make the portions just a bit bigger...

I don't know what your calorie goal is but 500 calories under sure doesn't sound good ecspecially if your using the MFP to track what you eat....

Up your breakfast calories and eat a few more ounces of your dinner protein.

It's probably ok to be a little bit under, but 500 calories is a bit much... and you didn't ask for opinions about how many calories you eat.

Add just a small amount to the things you're already eating. Instead of an open sandwich, how about closing it with a second slice of bread? Two eggs instead of one? More peanut butter? How are you doing on fats -- your body needs some? Instead of low-fat milk and cheese all the time, eat regular or 2% some of the time.

As you say, fruit or vegetables are low calorie, so eating more won't up your calories much, but are you getting enough? The USDA estimates that young women should be eating about 2 cups of fruit and about 2 1/2 of vegetables a day. Depending on your goals, you can adjust with which ones you eat. For instance, cucumbers and celery for lower cal, avocado, beans, coconut for higher calories content. They're still lower than other foods, but much healthier than many other choices. Looks like you're generally eating healthy, can you eat just a bit more?

Other foods you can add that are not necessarily as healthy, or at least not as good for amount of nutrition per calorie but still aren't "empty" calories, are honey, salad dressing (not diet, something like olive oil and vinegar), chocolate (anti-oxidents and some other good stuff as well as flavor), ice cream (cold in the summer, calcium). Add a bit of cheese or avocado to your salad. Have a slice of toast with fruit jam.

Good luck!

Eat full fat versions of things and eat slightly larger portions.

It sounds like you're eating quite well, here's some suggestions of extras that you could add to meals that wont' make you feel too full:
- cheese - add a slice to your sandwich, or eat string cheese or Babybels as a snack.
- avocado - add it to lunch or dinner or eat it on grainy bread as a snack.
- olive oil - use it to cook your veggies or make dressing for your salad
- Yoghurt - add some to your cereal at breakfast time or eat it with fruit for a snack
- boiled eggs

You could also increase portions slightly (2/3 cup of rice or pasta), a bit more meat or fish.

I wouldn't get stressed about eating every last calorie, but 500 under is a bit too far in my opionion, so I think it's a good idea to bump up your intake slightly. Don't focus on restricting and dieting, try to put your energy into learning about healthy foods and portion sizes so you are in a good position to stay healthy for the long term.