Add ground beef and onions and brown stirring over medium-high heat for a few minutes. In a large skillet heat oil over medium heat add onion and garlic and cook for 4 minutes stirring occasionally.
Place a small amount of the spaghetti sauce in the bottom of your slow cooker.
Slow cooker ravioli casserole. Transfer beef mixture to slow cooker. How to Make Crockpot Ravioli lasagna This recipe is layered like a lasagna right on top of each other before cooking. Layer sauce frozen ravioli uncooked and cheese in a slow cooker.
In a medium bowl stir together the crushed tomatoes tomato paste water onion minced garlic Italian seasoning and salt pepper. Spray or oil your slow cooker insert Pour a third of the pasta sauce over the bottom of the crockpot Toss in half the frozen meatballs and pour half the evaporated milk over the top Toss in half. Stir slightly to combine.
Grease large nonstick skillet with cooking spray. Top with the bag of frozen ravioli and pour the remaining sauce over the top. Pour in tomato sauce and add seasoning.
Place 1 cup of sauce in crock pot. Stir in pasta sauce tomato sauce and Italian seasoning. Add tomato sauce and stir.
Cook for approximately 2½ hours on high. Add 1 package of the ravioli. Brown sausage and drain fat.
Pour the frozen ravioli into a 6-quart slow cooker. Cover slow cooker and cook on low-heat setting for 6-7 hours.