According to the nutrition guide I should be getting about 2,300 calories a day. Im having a hard time getting over 1,800 with eating healthy and steadily throughout the day. An average meal plan for the day looks like this:

Breakfast: 3 egg whites
1 piece of fruit (kiwi or banana)
1/2 cup plain greek yogurt
Green Tea

Then I have my Insanity workout

Lunch: Protein Shake
1 scoop protein powder (muscle pharm)
3 tbsp plain greek yogurt
1/2 frozen berries
2 tbsp almonds
1 tbsp flaxseed meal
10oz skim milk

Snack: Fruit (banana or pineapple)

Dinner: Chicken with Quinoa
Big Salad with a little bit of dressing

Snack: Protein Shake (just the protein and skim milk)
more fruit

I also drink plenty of water throughout the day.

So how can I boost my calories without buying expensive meal replacement bars?! I know I got to be missing something. Any help would be awesome. I've already lost 2 lbs in my first 5 days but i've heard that its best to do what the nutrition guide says. Help me!