Hello, xaw8, and welcome to the San Francisco forum.
You've posted your where to stop for lunch question in the San Francisco forum. . . which is all about that lovely City by the Bay and all its attractions, lodgings and restaurants within SF itself. You might want to repost your question to the California state forum here tripadvisor.com/ShowForum-g28926-i29-Califor… which covers travel within California, as well as the Monterey forum here tripadvisor.com/ShowForum-g32737-i159-Monter… which is for Monterey specifically.
I'll still take a shot at your question. You can drive through Monterey's Cannery Row area without stopping, and drive slowly along the shoreline to the entrance to 17 Mile Drive in Pacific Grove/Pebble Beach (~$10 fee). More great views of the coast with plenty of parking on a Summer Sunday. The roads are meant to be taken slowly and leisurely, and are not twisty or anything that would in my opinion cause car sickness. Exit 17 Mile Drive and enter Carmel and go downtown. Parking should not be too difficult to find, and there are a variety of sandwich shops/delicatessens and restaurants to choose from. Streets there are in a square/rectangular grid, though there are hills downsloping to the ocean. Getting back to US Route 101 from Carmel is via straight type roads, (definitely don't take California State Route 1/Pacific Coast Highway due to your car sickness predisposition), and US Route 101 itself is pretty much straight going south to Pismo Beach and beyond.
Enjoy your travels with us.