working away from home

Options
Okay so i am going away for work for a whole week. Living in a guesthouse and having to pack lunch for this days. I wont have a fridge to store my lunch during the day, and at this stage i am trying the new thing were i do not eat after 5pm and not a big meal at all. Only small amount of protein. Reached a plateau, trying to break it. Anyhow i need ideas of what to pack for lunch, maybe somethings that can be prepared over the weekend to take with. And it should be my big meal for the day. help please...