Heat the oil or butter in a large, roomy skillet over medium-low heat. Add the onion. Cook, stirring every now and then, for 5-7 minutes, or until the onions are gently browning. Add the cabbage, 1 cup vegetable broth, smoked paprika, and vegan bacon if using. Continue cooking the vegetables for 10 minutes, stirring often, or until the onions have darkened and the cabbage is very tender. If the vegetables get at all dry, add a few extra splashes of broth.