What is for Dinner?

One part of making dinner that I struggle with is planning out meals ahead of time. Most of the help I need there is having a list to go shopping for so I can do at least 2-3 days of shopping at a time.

This can consistently reproduce a decision for a given date assuming the tree hasn't changed. Example output:

$ wifd
2015-01-03
  Protein: Pork
  Veggie: Brussel Sprouts
2015-01-04
  Protein: Lamb
  Veggie: Brussel Sprouts
2015-01-05
  Protein: Beef
  Veggie: Salad
2015-01-06
  Protein: Pork
  Veggie: Fingerling Potatoes
2015-01-07
  Protein: Pork
  Veggie: Fingerling Potatoes
2015-01-08
  Protein: Halibut
  Veggie: Asparagus
2015-01-09
  Protein: Pork
  Veggie: Broccoli