I have an eight-foot square patch of weeds in my back yard, next to the compost tumbler. As of last summer, they stayed fairly low to the ground, but this spring have shot up and now are easily 4-feet high. The leaves look rough, like kale. Seeds at the top look like quinoa. What are these plants? Are there parts that are edible? Parts I should avoid? Is there some look-alike toxic twin? My guess is this question’s title line, and three photos are attached. Thank you.