Slow-Baked Lasagna That Fills the House

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Slow-Baked Lasagna That Fills the House

A cozy, slow-baked lasagna with a gently simmered meat sauce, tender noodles, and a calm, creamy ricotta layer—finished with a long bake that makes the whole kitchen smell like home.

By @sundayroastsJanuary 6, 2026

This is the kind of lasagna you start in the afternoon, with no hurry and nowhere else to be. The sauce simmers softly while you tidy the kitchen and let the house settle into that warm, familiar smell. By the time it comes out of the oven, the edges are a little caramelized and everything feels slower—in the best way.

Total Time

2 hr 45 min

Prep Time

30 min

Cook Time

2 hr 15 min

Servings

8

Ingredients

Slow-Simmered Meat Sauce

  • 2 tbsp olive oil
  • 1 large yellow onion, finely chopped
  • 2 medium carrots, finely chopped
  • 2 celery stalks, finely chopped
  • 4 cloves garlic, minced
  • 1 lb (450 g) ground beef (80–85% lean)
  • 1/2 lb (225 g) Italian sausage, casings removed (sweet or mild)
  • 2 tbsp tomato paste
  • 1/2 cup (120 ml) dry red wine (or beef broth)
  • 1 (28 oz/794 g) can crushed tomatoes
  • 1 (14½ oz/411 g) can diced tomatoes
  • 1 cup (240 ml) low-sodium beef broth (or water)
  • 1 tsp dried oregano
  • 1 tsp dried basil
  • 1/2 tsp red pepper flakes (optional)
  • 1 1/2 tsp kosher salt, plus more to taste
  • 1/2 tsp freshly ground black pepper
  • 1 bay leaf

Cheese Filling

  • 15 oz (425 g) whole-milk ricotta
  • 1 large egg
  • 1/2 cup (50 g) grated Parmesan, plus more for serving
  • 2 tbsp chopped fresh parsley (or 1 tbsp dried)
  • 1/2 tsp kosher salt
  • 1/4 tsp black pepper

Pasta + Assembly

  • 12 lasagna noodles (regular or no-boil; see instructions)
  • 4 cups (400 g) shredded mozzarella (low-moisture)
  • 2 tbsp unsalted butter, cut into small pieces (optional, for extra browning)

Instructions

  1. 1

    Make the sauce: In a large Dutch oven or heavy pot, warm the olive oil over medium heat. Add onion, carrots, and celery with a pinch of salt and cook, stirring now and then, until softened and sweet, 8–10 minutes. Stir in garlic for 30 seconds.

  2. 2

    Add the beef and sausage. Cook, breaking up the meat, until no longer pink and lightly browned, 8–10 minutes. Spoon off excess fat if needed.

  3. 3

    Stir in tomato paste and cook for 1–2 minutes to deepen the flavor. Pour in the wine (or broth) and scrape up any browned bits from the bottom.

  4. 4

    Add crushed tomatoes, diced tomatoes, broth, oregano, basil, red pepper flakes (if using), salt, pepper, and bay leaf. Bring to a gentle simmer, then lower the heat and let it quietly bubble, partially covered, for 45–60 minutes, stirring occasionally. Taste and adjust salt. Remove bay leaf.

  5. 5

    Meanwhile, make the cheese filling: In a bowl, mix ricotta, egg, Parmesan, parsley, salt, and pepper until smooth.

  6. 6

    Prepare noodles: If using regular lasagna noodles, cook in well-salted water until just shy of al dente (about 2 minutes less than package directions). Drain and lay flat on a lightly oiled sheet pan or parchment to prevent sticking. If using no-boil noodles, skip boiling; make sure your sauce is on the looser side (add a splash of broth if it has thickened a lot).

  7. 7

    Heat oven to 325°F (165°C). Lightly oil a 9x13-inch (23x33 cm) baking dish.

  8. 8

    Assemble: Spread 1 cup of sauce in the bottom of the dish. Add a layer of noodles (about 3). Dollop and spread 1/3 of the ricotta mixture. Sprinkle with 1 cup mozzarella. Spoon over about 1 1/2 cups sauce. Repeat twice more (noodles, ricotta, mozzarella, sauce).

  9. 9

    Finish: Add a final layer of noodles, top with remaining sauce, then the remaining mozzarella. Sprinkle a little extra Parmesan if you like. Dot with the butter pieces (optional).

  10. 10

    Bake slow: Cover tightly with foil and bake for 60 minutes. Uncover and bake 25–35 minutes more, until bubbling at the edges and the top is deeply melted and lightly browned.

  11. 11

    Rest: Let the lasagna sit for 20–30 minutes before slicing. This quiet pause helps it set into clean, cozy layers.

  12. 12

    Serve: Slice and serve warm, with extra Parmesan at the table. It’s even better the next day.

Nutrition Facts

Per serving

Calories602
% Daily Value*
Total Fat38.5g49%
Saturated Fat16.2g81%
Cholesterol121.9mg41%
Sodium1067.7mg46%
Total Carbohydrate35.9g13%
Dietary Fiber6.4g23%
Total Sugars12g
Protein37.7g75%

* Percent Daily Values are based on a 2,000 calorie diet.

Nutrition calculated automatically from ingredients.

BakedMain DishMake AheadDinnerItalianPorkBeefOne Pot

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