Leafy greens showing up formed in stool - is this normal?

Lately my BM has been relatively normal. I go once, maybe twice a day. A strange (or maybe not) thing I've been noticing is that after eating something like spinach, lettuce, or any leafy green vegetable, they tend to show up in my next BM. They look digested, but are prevalent and noticeable. I can't remember if this has always happened or if it's a recent thing for me. Is this something that everyone experiences, or at least not something to be concerned about?

Okay, great. I've been eating a lot more greens lately because I'm lactose intolerant and want other sources of calcium.