If you are living in the University Campuses (Colina or Memo) you will find it convenient to have lunch at the Student Refectory (Cantina studențească), for ≈ 5 euro/meal. The Student Refectories are very close to the Memo and Colina Halls of Residence.
There are evidently many restaurants in town that offer more varied meals from a wide range of European, Asian, Italian or Mexican cuisines, for ≈ 5-20 euro/meal. Food markets and supermarkets are opened every day, located in practically all parts of the town, where you can get fresh vegetables, fruits, meat, eggs or cheese.