Taste Bud offers perhaps the best value lunch in Stellenbosch with a buffet of high quality, fresh, healthful food. You can also order sandwiches, which are good, but the buffet is your best bet. The baked goods are dangerously good (dangerous to the waistline), and the staff is friendly and attentive. The wine list offers a good selection at the proper price point to match your lunch.
The clientele is a good mix of Stellenbosch: mothers with children, students, local artists and wine farmers (when not harvest time!) and business people looking for a quick, tasty bite at lunch. It is centrally located in town, but not on the beaten tourist path, so it feels more authentic than other restaurants in town.
The restaurant also offers breakfast (which I haven't experienced) and a limited selection of baked goods to go with an afternoon tea (the baked goods are generally sold out by 3pm, though).