More about Lyon...

Oh, btw, when you're in Lyon, don't miss the central local butchery market "La Boucherie Centrale" located at:

102, cours lafayette - Halle de Lyon
69003 Lyon

It has a lot of meats there, but what you'd be most interested in is the sauages--one of the traditional foods of Lyon (another one is beef tripes :) You got to try their 血腸!

From 蛇果 Travel:
現時La Halle de Lyon是全法國優秀貨品最齊備的街市，市內的餐館和星級餐廳的廚師，都前來選購心水材料，集合各式肉檔、芝士檔、蔬菜檔、魚檔、酒鋪等等，尚有餅店、小酒吧、生蠔吧、三文魚吧等，是可以讓大家即買即食的地方。
營業時間：
星期二至四7:30am-12nn、3pm-7pm 星期五及六7:30am-7pm 星期日7:30am-12nn

地址：
102, Cours Lafayette

交通：
地鐵PartDieu站下車，徒步8分鐘。

You can fix all your lunches there for a good price.

This article from 蛇果 is pretty good too.