01 - Heat a large skillet over medium-high heat. Add the butter and allow it to melt completely, coating the bottom of the pan.
02 - Add the sliced kielbasa in a single layer and cook for about 4 minutes, turning once, until both sides are deeply browned. Remove the sausage from the skillet and set aside on a plate.
03 - In the same skillet, add the chopped onion and sliced potatoes. Cook for 6–8 minutes, stirring occasionally, until the potatoes begin to soften and develop golden edges.
04 - Stir in the minced garlic, diced bell pepper, and broccoli florets. Sauté for 3–4 minutes until the garlic is fragrant and the vegetables are beginning to tenderize.
05 - Return the browned kielbasa to the skillet. Sprinkle with smoked paprika, dried oregano, salt, and black pepper. Toss everything together until evenly combined.
06 - Reduce heat to low. Sprinkle the shredded cheddar cheese evenly over the entire mixture. Cover the skillet with a lid and cook for 3–5 minutes, until the cheese is fully melted and the potatoes are fork-tender.
07 - Remove from heat, garnish with chopped fresh parsley if desired, and serve immediately while hot.