Edible Weeds: Yellow Rocket

I saw a pretty yellow flower and am fairly certain it is a Yellow Rocket. I took some slightly fuzzy photos and posted them below.  This plant is classified as a weed in Ontario. It is edible, though some sites indicate that there is a risk for kidney trouble from eating the leaves.  It is likely best not to overindulge in this particular green.  It's also known as Wintercress and as Herb of St. Barbara and can be made into a soup.  Older leaves are bitter.

Here are links to recipes:
Yellow Rocket Soup
Sauteed Yellow Rocket & Yellow Rocket with Bacon and Shallots
Random Yellow Rocket Suggestions
Bread Spread, Wintercress Salad, Sautee & Patties

Info from:
1) Edible Wild Food: Yellow Rocket
2) Ontario Wildflowers: Yellow Rocket
3) Ontario Weeds: Yellow Rocket
4) Plants for a Future: Barbarea vulgaris