My hometown is San Diego, so i'm not sure i know "Authentic Deli" but i know what i like! These are my two favorites ~ we visit 2-3 times a year, and we ALWAYS stop by these restauants.
DZ Akins
6930 Alvarado Road
San Diego, California 92120
http://dzakinsdeli.com/ (beware of pickle jars on the table, you could fill up on these crunchy dills ~ but dont! i think you'll like these half-crispy/half vinegary dills. i adore the kreplatch soup, and usually order the mishmash *add a softball sized matzo ball*. sandwiches are big, two hands required to start, then scoop the rest up with a fork! dinner plates even bigger. i like DZ's knishses better than Miltons, as they are more the individual type *not the pan-cut-into-squares-type*. cabbage rolls big as your fist. DZ's potato salad is outstanding, not your run-of-the-mill mayo mess, but a vegetable-flecked mix of cubed and smooshed potatoes.. oh.. im drooling now! the desserts are amazing, and if you're too full to eat there, theres a take-out bakery too)
Milton's
2660 via de la valle
del mar, ca 92014
http://www.miltonsbaking.com/ (i often order the combo salad plate, you pick 3 and its served with an assorted bread basket. the chicken salad and chopped liver are rich and delicious. excellent bread is baked on site. stuffed cabbage rolls at Milton are in a sweet sour sauce and have huge chunks of corned been in it. again, take out bakery if you overstuff yourself. my 74 year old dad finished a breadbasket and everything that accompanied his 3 egg omlette. my husband usually dives into a ruben, and doesnt come up to talk till he's finished every bite.)
now im homesick and hungry.. and seattle has absolutely NOTHING resembling a deli (Salumi excluded, but they're open limited hours..so i dont count them...)
elicia