ledameredith.com/garlic-mustard-pesto/
This is a recipe from The Forager's Feast: How to Identify, Gather, and Prepare Wild Edibles.... Garlic mustard is a biennial that has been hanging out all winter, even when its leaves were buried under snow in cold winter areas.
I didn't know it is biennial. I do not yet see any sign of garlic mustard here, and the snow is all gone.