La Bocca is an Italian restaurant directly across the road from the first Theppraya Rd entrance to Jomtien Plaza. (It is nowhere near Sunnee Plaza!)
If you stand there in the JP and look straight out over the road and then just a small movement of the head to the right you'll see it easily. After 7-8 pm it can get quite busy inside (air con) but there are 3 or 4 tables outside on the patio, which I prefer ... but others may not.
Pretty good pizzas, though there are better pizza joints in the same area. I was in Jomtien last week and a friend of mine took me to Toto Italian Restaurant and Pizzeria (just outside the Complex on the street going to the beach). Really really delicious.

PS ... Francois is heads and shoulders above LonelyWombat vis-a-vis directions. Frankly, I'm surprised that LW can actually get out of bed, much less ...