I just bought random stuff that looked compatible,
threw it together, and it was great. To the best
of my recollection, it was:

3 thick slices of panchetta (the nitrate-free
type sold at Whole Foods)
1 large cucumber
5 large tomatillos (any size is okay, but should all
be the same size -- lighter in color is better)
1 bunch cilantro
2 teaspoons black pepper, finely ground
1 can TJ's sweet corn
1 can TJ's chicken broth

Pan-fried the panchetta, drained,
patted off the fat between paper
towels, cut into thin strips,
cut these strips in half, so the
longest ones were about an inch.

Peeled the cucumber, cut off ends,
cut lengthwise and scooped out the
seeds, then cut each piece crosswise
into two sections. Blanched for 3
minutes in water.

Peeled tomatillos of their husks,
blanched 6 minutes in water. (Should
have blanched for 7 minutes -- these
were big ones.)

Peeled and cored the tomatillos.
Cut the large cucumber sections once
lengthwise and once or twice crosswise
into 4-6 chunks each. Pureed all of
it with a hand blender. Tasted the
result and decided it was too watery.
So, a can of sweet corn was pureed
in its packing liquid with a hand
blender.

A can of chicken broth was brought
to a boil, and the two purees were
added, along with the panchetta and
black pepper. Stirred constantly
while on high heat until it just
barely started to boil. Added
finely chopped cilantro and shut
the heat off.

This made three bowls of soup.
The cilantro had darkened by the time
I served myself the second and third
bowls, but the flavor was just great.
The tartness of the tomatillos was
an excellent counterpoint to the
sweetness of the corn. I'm not sure
the cucumber added anything, so I
may delete it in the future.

I could probably have used one less
tomatillo (or smaller ones, had they
been available), but this was a satisfying
result. Had I chosen tomatillos that
were darker green, I definitely could
have used fewer of them because they
are much more tart, but I prefer to
buy the lightest ones I can find
in order to obtain a more fruity
tomatillo flavor.