✔ 最佳答案
I would suggest a restaurant in Champs Elysee called "Lyon de Bruxelle". It's famous for it's mussel. The set menu cost around 25 - 30 euro, but you will get very full after having it.
The shop can be easily found in Champs Elysee. Standing next to LV and back to the Arc de Triomphe, walking along the road, then you can find it within 2 min.