Prep the potatoes: Wash and dice into even 1/2-inch cubes so they cook at the same speed. Pat dry to help them crisp.
Toss with seasoning: In a large bowl, combine potatoes with 1–2 tablespoons olive oil, ranch seasoning, paprika, and black pepper.
Add a light pinch of salt only if needed.
Start the skillet: Heat a large oven-safe skillet over medium-high. Add a drizzle of oil and brown the sliced sausage for 3–4 minutes per side until edges crisp. Remove sausage to a plate.
Sauté aromatics: In the same skillet, add onion and bell pepper with a pinch of salt.
Cook 3–4 minutes until softened. Stir in garlic for the last 30 seconds.
Crisp the potatoes: Add the seasoned potatoes to the skillet. Spread them out in an even layer and let them sear, undisturbed, for 3–4 minutes to develop color.
Stir and repeat. Cook 10–12 minutes total, until edges are golden and centers are tender.
Make it creamy: Reduce heat to medium-low. Stir in sour cream until it coats the potatoes.
If it feels too thick, add a tablespoon of water or milk to loosen.
Add sausage and cheese: Return the sausage to the pan and fold to combine. Sprinkle cheese evenly over the top. Cover the skillet with a lid or foil for 2–3 minutes to melt.
Taste and finish: Adjust seasoning with salt and pepper as needed.
Garnish with chopped green onions or parsley.
Serve hot: Spoon into bowls and enjoy as-is, or add a fried egg, hot sauce, or a side salad for balance.