Plant ID

I think you're right. In most of the images I saw online the leaves looked different, but on the USDA USFS site has an image that looks like it.

I noticed that the leaves weren't quite right on the images I saw, but the stems reminded me of watercress. It's listed as noxious or invasive by 46 states! https://www.fs.usda.gov/wildflowers/plant-of-the-week/nasturtium_officinale.shtml