As I was driving around today, I stumbled on a great little supermarket called Delis.
Delis Supermarket and Cafe is located on the main drag in Wuse 2 (see location on google maps) and has a really great selection. There are three main sections: as you enter you’ll find vegetables and snacky type things in the main area, as well as some cans etc. Upstairs is the cafe and the delicatessen which sells meats, cheeses, etc, including some pre-made stuff. Downstairs, you’ll find the dry food section with everything from baby milk to BBQ sauce, and they even have Marmite!
Delis have a really good selection for such a small supermarket. Well worth a visit!