The snow has melted enough that I'm able to start my soup again! If you're interested, the recipe is as follows:
1 large black pot (composter)
coffee grounds (for the worms)
eggshells - crushed
dry grass/twigs, etc.
garden fork, etc. for stirring it
water for watering it (!)
a keen eye to see how much it "drops" in a day - which shows it's "cooking"
grateful plants which wait for the first "batch"