Slow-Cooker Boursin Kielbasa Baked Ziti Step-by-step instructions

Before you start

Before you start, slice the kielbasa into even 1/2-inch rounds. Measure the marinara sauce and shred the fontina cheese if it's not pre-shredded. Make sure your slow cooker is clean and dry. There's no need to pre-cook the pasta or sauté anything.

Just have all your ingredients ready to go, and you'll have this dish assembled in less than ten minutes. If you have time, let the Boursin cheese sit at room temperature for a few minutes to soften, which will help it melt more quickly, but it's not necessary.

Instructions

Layer and Go

1. 1Layer the Ingredients
   Place the sliced kielbasa in the bottom of a 6-quart slow cooker. Add the ziti pasta, then pour the marinara sauce over the top. Sprinkle with the Italian herb seasoning. Do not stir.
   Look for The kielbasa should be covered by the pasta and sauce.
   Tip Use a spatula to spread the sauce evenly without mixing.

After this phase, the slow cooker contains a neat stack of kielbasa, dry pasta, marinara, and herbs. The ingredients are not mixed, but they are evenly distributed. The kielbasa is at the bottom, the pasta in the middle, and the sauce on top.

This layering is important because it allows the pasta to cook in the sauce while the kielbasa releases its juices upward. The herbs are sprinkled over the sauce, ready to infuse the dish with flavor.

Top with Cheese

2. 2Add Cheeses
   Place the wheel of Boursin cheese in the center of the slow cooker. Sprinkle the shredded fontina cheese over the top, covering the Boursin and pasta.
   Look for The top is covered with a layer of fontina.
   Tip The Boursin will melt into the sauce as it cooks.

The Boursin wheel sits in the center, surrounded by a blanket of shredded fontina. The cheese looks dry and crumbly at this point, but as the slow cooker heats up, it will melt into a golden, bubbly topping. The Boursin will soften and spread, creating pockets of creamy herb cheese throughout the dish. The fontina will melt into a stretchy, gooey layer that browns slightly at the edges, giving the dish a baked-ziti appearance.

Bubble and Serve

3. 3Slow Cook
   Cover the slow cooker and cook on low for 3 hours, or until the pasta is tender and the sauce is bubbling. Stir gently before serving to combine the melted Boursin into the sauce.
   Look for The sauce is bubbly and the cheese is fully melted.
   Tip If the pasta is still firm after 3 hours, cook for 30 more minutes.

After three hours, the slow cooker is bubbling gently at the edges. The sauce has thickened and turned a deep red, with streaks of creamy Boursin swirling through it. The fontina has melted into a golden, blistered top, and the pasta is tender. The kitchen smells of garlic, herbs, and smoked sausage. When you stir, the sauce is rich and creamy, coating every piece of pasta. The kielbasa is caramelized at the edges and adds a savory bite.

Common mistakes

One common mistake is stirring the ingredients before cooking. This can cause the pasta to stick to the bottom and cook unevenly. Instead, layer the ingredients as directed and let the slow cooker do the work. Another mistake is using too much liquid; the marinara sauce is enough to cook the pasta, so don't add water or broth.

Also, be careful not to overcook the dish, as the pasta can become mushy. Check it at the 2.5-hour mark and adjust the cooking time based on your slow cooker. Finally, resist the urge to lift the lid and stir during cooking, as this releases heat and extends the cooking time.

How to tell it’s done

The dish is done when the pasta is tender and has absorbed most of the sauce, and the cheese is fully melted and bubbling around the edges. To test the pasta, fish out a piece with a fork and taste it; it should be al dente, with a slight bite. The sauce should be thick and creamy, not watery.

If the pasta is still hard, cook for another 30 minutes and check again. The internal temperature of the dish should be at least 165°F (74°C) for food safety, though since the kielbasa is pre-cooked, the main concern is the pasta's texture.