Here are the answers to your questions:
1. Kvenland was an ancient name for the area in Scandinavia and Fennoscandia.
2. Christianization took place between the 8th and 12th centuries. Around 980, Harald Bluetooth Christianized Denmark. It began in Norway by Olaf Tryggvason 995 AD – 1000AD and Olaf Haraldsson 1015 AD – 1030 AD. Olof Skötkonung 980 -1022 began in Sweden.
3. If many of the foods of the area have a salty or smoky taste, or are pickled or dried, it’s largely because of winter and the need to preserve foods without refrigeration.