Unfortunately, this place isn't very conveniently located with respect to most tourist areas, but it's worth the trip, which is about an 8-10 min moto ride from the middle of Sanur. It's a little tricky to find because the street numbering is a bit confusing, but it has good street signage (see photo), so is fairly easy to spot once you're in the right area.
The food is quite simple, but tasty. The Happy Cow description suggests that it's Chinese, but the food is definitely more Indonesian / Malaysian as far as I could tell. There's no English menu, but there are a few dishes presented in a display case. If you like the look of these, just order the Nasi Padang, which is steamed rice with a mix of the display dishes.
The owner speaks some limited English, so can help out a little with menu translations if you want something different. She also seems lovely, and absolutely refused to accept a tip when I was paying for my meal.
There are noodle dishes, rice dishes and soups on offer, with tofu, tempeh, veggies and a small variety of mock meats, and everything costs between 15k and 25k rupiah.
Stuff from the display case will be served at room temperature, but I assume the other things on the menu are served hot.
It's definitely a cheap eats kind of place. Don't go expecting much ambience, but it's a nice, casual local experience. Nice to find a veggie place like this in Bali - they're not all that common.
Cons: Awkward to get to, No English menu, Small menu