I grew up eating this, not just as a side dish, but as a main meal. My grandmother would make a pot of it, and spoon some over a thick slab of Italian bread, which would absorb the juices. This is true comfort food to me! However, if that doesn't sound like a meal to you, you can always add 1 pound of Italian sausage. Reduce the olive oil to 1 T., and cook the sausage, turning occasionally, until browned and cooked through, about 10 minutes. Transfer to a cutting board and let rest at least 5 minutes before slicing. Then add the onions to the pan and continue from there.