What to do with leftover yarn from a multicolor cowl or shawl?

Knit this shawl!

I wanted a shawl that would allow me to easily use the yarn that remained. Loving asymmetric boomerang shawls, I knew just what style of shawl to design. Most of this shawl is knit in garter stitch, which makes it easy and almost effortless. A simple lace repeat at the ending adds a bit of interest.

Feel free to knit the shawl exactly as written, but I would love to see you dig into your remnant stash, unleash your creativity, and use this as a template. I have included modifications and a table of stitch counts that will help you maximize the yarn that you have and allow you to have as much flexibility as possible.

Materials
Yarn recommended: Fingering weight
Total yardage: 648-792 yards/ 592-724 meters
Sample used Sun Valley Fibers, MCN Fingering 80% Merino, 10% Cashmere goat, 10% Nylon/Polyamide, 100 grams/3.5 oz, 400 yards (366 meters); 1 skein
MC: Kent (dark gray) 280 yards (256 meters)
CC1: Smoke signals (light gray) 280 yards (256 meters)
CC2: Adornment (pink) 160 yards (146 meters)

Needle:  US size 6/4.5 mm, 24 “ (60cm) or longer circular needle, or size needed to obtain gauge.
 
Notions: darning needle, scissors, scale, crochet hook (same size needed for gauge - optional), wool wash (optional).

Size
One size
Length: 66 inches (167 cm)
Depth: 16 inches (40 cm)
This pattern includes multiple modifications and your dimensions may vary.

Gauge
Garter knit flat after blocking: 22 stitches/4 inches (10 cm); 48 rows/4 inches (10 cm).

For once, I will say that gauge is not crucial to this project, but a different gauge will affect yardage and final measurements. 

Thank you to my tech editor (aersknits) and test knitters.