How to find out what the meal service will be for a specific Alaska Air flight:
1) On the website, use the "Explore" tab and select "Flight Schedules" from the left-hand side of the drop-down menu.

2) Plug in your city-pair and your week of travel, and the site will pull up all of the Alaska Air flights for that week.

3) Find your flight number on the list. From there you can see what's offered for the meal service. There are two columns corresponding to first class and coach.
A) In first class the codes are (B-breakfast; L-lunch; D-dinner; S-snack).

B) For coach the section may be blank (meaning beverage service and for-purchase cold snack-packs). Or it may show "F" or "F,F" to indicate there are other items for purchase on longer routes like a cheese plate, or in some cases the Beecher's breakfast sandwich or one of the Tom Douglas items.

What *specifically* is offered in first class for B, L, D, or S is the source of much discussion in this thread.
Sometimes a S (snack) will seem more substantial than what's offered as L (lunch). That's where searching this thread can be of assistance.

As near as I can tell for the coach section:
Blank = snack packs only;
"F" = snack packs and cheese plates offered;
"F,F" = snack packs, cheese plate, plus one other item on offer.
Please feel free to edit if that assumption is not correct.

For anyone desiring a more structured or organized submission, here is a template (You'll need to add a / before the last bracketed B as in [/b]):

[B]Date of Flight[B]:
[B]Flight Number and Route flown[B]:
[B]Time of Departure[B]:
[B]Length of flight[B]:
[B]Class of service[B]:
[B]Pre-Departure Beverage service[B]:
[B]Meal served[B]:
[B]Meal Description[B]: .

[B]Additional Comments[B]: