Lasagna with Bean Ragu

Preheat oven to 425 degrees.

Place onions, celery, carrot, and pancetta in the bowl of a food processor; pulse until finely chopped.

Place 1 tablespoon olive oil, chopped vegetable mixture, and rosemary in a Dutch oven over medium heat. Cook, stirring, until vegetables are caramelized, about 10 minutes. Add beans and continue cooking 5 minutes more. Add red wine and cook until liquid is reduced by half.

Add tomato sauce and stock; stir to combine. Transfer to oven and cook for 20 minutes. Season with salt and pepper, return to oven and cook for 10 minutes more.

Meanwhile, bring a large pot of water to a boil over high heat. Add 1/2 cup salt and return to a boil. Add lasagna pieces and cook, according to package directions, until al dente. Drain, reserving 1/4 cup pasta cooking water.

Transfer pasta to Dutch oven, adding pasta cooking water, 1 tablespoon at a time, if sauce seems too thick. Continue to cook pasta, stirring, in the hot sauce, 3 to 5 minutes more. Season with salt and pepper.

In a large bowl or serving platter, place a layer of just the sauce; top with a layer of pasta and sprinkle with a third of the cheese. Repeat layering process two more times with remaining sauce, pasta, and cheese; sprinkle with parsley. Serve immediately.