"Haricot verts" is a French term that means "green beans" in English. It specifically refers to young, thin, and tender green beans that are usually harvested early. Full definition
You can use chunky tomatoes or straight up marinara as I did above but I always add in some vegetables and herbs, here I added haricot verts with a few olives. (prouditaliancook.com)
Return water to a boil and cook haricots verts in same saucepan until crisp - tender, about 2 minutes. (bonappetit.com)
Continue with the following ingredients, maintaining water at a depth of 2 inches throughout and returning water to a boil between batches: Cook haricots verts until just tender and bright green, 4 — 5 minutes; transfer to a large bowl of ice water and let cool. (bonappetit.com)