My staple for evening meal is beans and rice. Cook up the rice (about 1 dl/person + salt), when it's done boiling (ca. 15 mins) throw a can of beans in (preferably without the can ... done... tabasco and olive oil to flavour...

Many shops in France close between noon and 4 p.m. Mondays many shops can be closed all day (aswell as sundays, so stock up on saturdays). Outside of larger towns you'll find great hypermarkets (open all day, but most often closed on sundays aswell).

My quick energy fix through the day is a french speciality "pain au chocolat"... dark chocolate whacked into baguette or "pain au banan" (work that one out!)...

Bon voyage et bon appetit!