Bulgarian cuisine is tasty and surprisingly healthy. A meal will usually start with a salad, the most traditional one being the 'Shopska', a mix of chopped tomato, cucumber, pepper and onion topped with white sheep's cheese, traditionally washed down with a rakia (local brandy).
The main course will usually be some kind of grilled meat or fried fish. Make sure to ask whether your main course comes with a side serving of vegetables and potatoes, known as 'garnitura', otherwise you may end up without.There is not a lot of choice for dessert often just pancake with honey or jam.
Worth noting is that Bulgarians tend not to serve food piping hot, so you may need to ask them to do so if you are particular about it.