Preheat your oven to 375°F (190°C). This ensures your dish cooks evenly from the start. While it heats, gather all your chopped vegetables and sliced sausage.
In a large mixing bowl, combine potatoes, sausage, onion, bell pepper, garlic, paprika, salt, and pepper. Drizzle with olive oil and ranch dressing, tossing until each piece is coated in flavor.
Spread the mixture evenly in a baking dish. Bake for 25–30 minutes until potatoes are fork-tender and slightly browned on the edges.
Remove the dish from the oven and sprinkle shredded cheddar evenly over the top. Return to the oven for 5–10 minutes until cheese is melted, bubbly, and golden.
Let the dish cool slightly, then serve warm. Enjoy the gooey, cheesy, savory goodness straight from the pan.