Creating Cheesy Ranch Potatoes and Smoked Sausage is a breeze if you follow these steps:

1. Preheat the Oven: Begin by preheating your oven to 400°F (204°C).
2. Prepare Baking Dish: Grease a 9×13-inch baking dish with cooking spray or a little olive oil.
3. Combine Ingredients: In a large bowl, mix the sour cream, ranch seasoning mix, milk, salt, and pepper until well combined.
4. Add Potatoes: Fold in the diced potatoes until they are well coated in the mixture.
5. Layer Sausage: Layer the sliced smoked sausage over the potatoes in the prepared baking dish.
6. Top with Cheese: Sprinkle the shredded cheddar cheese evenly atop the sausage and potatoes.
7. Bake: Place the dish in the preheated oven and bake for 30-35 minutes or until the potatoes are tender and the cheese is bubbly and golden brown.
8. Rest: Remove from the oven and let it sit for 5-10 minutes to cool slightly before serving.
9. Garnish: Optionally, sprinkle with chopped green onions for added flavor and color.

This straightforward approach ensures that you achieve the best version of Cheesy Ranch Potatoes and Smoked Sausage effortlessly.