Heat a large pan on medium heat and add the sliced bacon. Cook until crispy, then remove to a paper towel-lined plate. Remove some bacon grease, leaving about 2 tablespoons in the pan.
Add the onion and sauté for 2 to 3 minutes, or until it's translucent.
Add the garlic, mustard, smoked paprika, salt, and pepper and give it a stir to combine.
Place the sliced cabbage on top and use a large spoon or tongs to stir and sauté together for another 12 to 15 minutes, until the cabbage is buttery soft and slightly caramelized.
Toss the bacon back in, and stir it all together before serving.