Here's what I did...
Green-ness: 5/5 Making your own food is very green! (and fun!)
Frugal-ness: 5/5 Very frugal. Using up food that might otherwise go to waste.
Time cost: Part of the afternoon maybe 15minutes of actual mixing and kneading but about 2 hours of rising and waiting.
Skill level: Pretty easy - give it a go!