Hmm I would make a recipe that takes a whole since you have the luxury of time. Ideas below.
Potato gratin. Slice super thin, make a bechamel sauce. Layer the potatoes and sauce in a Pyrex and bake.
I would google "potato gratin" and find a recipe that makes sense to you.
For the main: chicken scallopine. Cut chicken breasts into thin layers (2 per breast). Beat with tenderizing mallet a little. Salt and pepper and quickly fry in a very hot pan in a little oil.
With beef and potatoes:
shepherds pie
Make tiny meatballs and bake with penne and bechamel sauce (
www.smittenkitchen.com has a recipe for baked rigatoni and tiny meatballs).