When noodle soup calls to us, we beeline to Kevin’s in the Sunset. This casual Vietnamese restaurant is an institution, as evidenced by the perpetually packed dining room and tightly run operation. It’ll take approximately two seconds once you sit down for someone to take your order, and big steaming bowls of phở will land on the table soon after. Plus, portions are hearty, and everything on the menu, from richly spiced phở to fish sauce-sloshed vermicelli plates, will run you less than $15.