Insanity nutrition for dummies. (help)

Almonds and nuts, especially if you have a bulk foods section can be a relatively cost effective way to get in calories when you're under. Since you're doing an intense workout most days a week it's important that you're getting enough protein and calories, so it's good that you're aware that you should be eating more than your are.

That being said, I've found amazing results through lifting and a lower carb diet (no more than 40 net carbs a day which is carbs minus the fiber) so I would recommend removing the breakfast sandwich and replacing it with good ol' eggs and bacon or eggs and ham (basically what you're eating only subtracting the bread.) I find this breakfast to be satisfying and hearty or I'll make a crustless quiche during the weekend and portion it out for breakfast for my boyfriend and I for the week, which makes the morning easy and stress free, simply heat and eat. Quiche is nice because it's essentially mixing eggs, cream, cheese, meats and veggies (really whatever you like) and baking it in the oven. You could even make a quiche simply to have for your "snack" meals since it'll provide a plethora of nutrition along with the calories you need. If you're interested in going the keto (low carb) route or even just interested in learning some relatively easy recipes a great source is...

http://cavemanketo.com/

his recipes are easy and make large portions for reheating throughout the week, not to mention most of them can be made for fairly cheap with the meat being the most expensive item (which is usually is).

I'd say if you aren't down with going the low carb route your meals still seem much too small to stand alone and you should plump them up with a protein powder or other snacks. I find great prices for powders online on websites such as amazon. My personal favorite powder in terms of macros is "Sun Warrior" but it's a bit pricey, I'm sure you could find some other powders at your grocery store if it has a "healthy living" section. I'd recommend looking closely at the nutrition labels since a lot of powders have soy and unnecessary sweeteners which end up adding more than I need (but being a woman and having different calorie requirements may have something to do with it for me).
Be sure to check your grocery store circulars too, it's a great way to find meat and veggies on sale

As far as snack go, I stick to the high fat, high protein, and low carb route such as
pork rinds with French onion dip
pumpkin seeds
almonds
cheese (full fat, more protein, less sugar, win/win really)
celery with almond butter
sliced deli meats
cucumber with goat cheese
hardboiled eggs
deviled eggs (hard boiled eggs + mayo and mustard)
guacamole and vegetable

If you can manage to afford/ fit a few of these foods into your diet I don't doubt that you'll not only be satisfied (I mean, who doesn't love pork rinds?) but also closer to meeting your goals! Feel free to message me if you're interested in the keto way of life and good luck!