Heat olive oil in a skillet over medium-high heat. Add steak pieces and sear until browned on all sides, about 3-4 minutes. Remove from heat.

Layer half of the sliced potatoes in the bottom of the slow cooker. Top with half the onion, half the garlic, half the steak, and half the cheese. Repeat with remaining potatoes, onion, garlic, steak, and cheese.

In a small bowl, whisk together beef broth, sour cream, paprika, salt, and black pepper until smooth. Pour the mixture evenly over the ingredients in the slow cooker.

Cover and cook on LOW for 6 hours, or until potatoes are tender and steak is cooked through.

Uncover and let rest for 10 minutes before serving. Garnish with chopped fresh parsley if desired.