Slow Cooker Lasagna with Lean Ground Beef
A convenient slow cooker adaptation of classic lasagna that layers broken noodles with seasoned ground beef tomato sauce and creamy ricotta-mozzarella filling. This version uses lean ground beef and part-skim cheeses for lighter ingredients while maintaining rich, comforting Italian flavors. The crock pot method requires minimal active cooking time, making it ideal for busy weeknights or meal prep. Breaking the noodles allows them to cook evenly without pre-boiling, while the extended low heat melds the meat sauce and cheese layers into a cohesive, tender dish.
Ingredients
- 1 lb lean ground beef, browned
- 1 onion, chopped
- 1 clove garlic, minced
- 1 28 ounce can crushed tomatoes
- 1 15 ounce can tomato sauce
- 1 teaspoon salt
- 1 teaspoon dried oregano
- ½ teaspoon dried basil
- ¼ teaspoon red pepper flakes
- 1 cup part-skim ricotta cheesefull-fat ricotta1:1dairy
richer flavor but higher fat
- 1 ½ cups lowfat mozzarella cheese, shredded
- 6 lasagna noodles, broken in half
- ½ cup parmesan cheese, shredded
Instructions
- 1
Brown ground beef with onion and garlic in a skillet over medium-high heat, breaking up meat as it cooks.
- 2
Stir in crushed tomatoes, tomato sauce, salt, oregano, basil, and red pepper flakes. Simmer briefly.
- 3
Mix ricotta cheese with 1 cup mozzarella in a small bowl.
- 4
Layer in crock pot: spread one-third meat sauce, arrange half of broken noodles on top, spread half of ricotta mixture. Repeat layers.
- 5
Top with remaining meat sauce.
- 6
Cover and cook on low for 4 to 6 hours.
- 7
Combine remaining mozzarella and parmesan. Sprinkle over lasagna and let sit until cheese melts and lasagna firms, about 10 minutes.
Tips
Use very lean ground beef (4% fat or lower) or ground turkey to keep the dish lighter without sacrificing flavor.
Break lasagna noodles into pieces rather than using whole sheets for even cooking in the slow cooker without pre-boiling.
Reserve mozzarella and parmesan mixture to add at the end so cheese melts evenly and maintains texture rather than becoming overly soft.
Good to Know
Cover and refrigerate leftovers for up to 4 days. Reheat in a 325F oven covered with foil until warmed through, about 20-25 minutes.
Assemble lasagna in crock pot insert up to 8 hours ahead. Keep covered in refrigerator, then place insert in slow cooker base and cook as directed, adding 30 minutes to cooking time if starting from cold.
Serve hot directly from slow cooker set on warm setting. Pair with garlic bread and a simple green salad or Caesar salad.
Common Mistakes
Do not skip browning the meat; this develops flavor that slow cooking alone cannot replicate.
Do not cook on high heat; use low to avoid overcooked noodles and curdled cheese.
Do not stir the lasagna during cooking; let layers remain distinct.
Substitutions
Dairy-Free Swaps
richer flavor but higher fat
General Alternatives
FAQ
Can I use whole lasagna noodles instead of breaking them?
Yes, but you may need to break or overlap them to fit the crock pot and ensure even cooking. The broken noodle method works better because whole noodles require pre-boiling and can overcook or break apart in the slow cooker.
What if I don't have a small can of tomato sauce?
Use 1.5 cups of tomato sauce or add one 8-ounce can. You can also use more crushed tomatoes, though the texture will be slightly thinner. Simmer the sauce an extra 5-10 minutes on the stovetop to reduce liquid if needed.
Can I freeze lasagna and cook it later?
Yes, assemble completely in the crock pot insert, cover, and freeze for up to 3 months. Thaw overnight in the refrigerator, then cook on low for 5-7 hours. You can cook from frozen, but add 2-3 hours to cooking time.