Combine the ricotta cheese, eggs, and fresh basil in a bowl and stir well.
In a large bowl, combine both jars of pasta sauce and the tomato sauce together.
Grate the Parmesan cheese and set aside.
Grease the inside of a 6 qt slow cooker.
Add 2 1/3 cups of pasta sauce to the bottom of the slow cooker.
Add 1/3 of the uncooked penne. It's worth measuring the penne into 3 parts. before you begin to ensure an evenly cooked dish.
Dot on half of the ricotta mixture and spread out evenly.
Add half of the Parmesan cheese (1 cup).
Add another 2 1/3 cups of sauce mixture.
Add an additional 1/3 of the uncooked penne.
Dot on the remaining ricotta and spread out.
Sprinkle on the remaining parmesan cheese (1 cup).
Add the last 1/3 of the uncooked penne.
Top with the remaining 2 1/3 cups of sauce mixture.
Cover the crock pot baked ziti and cook it on high for 2-3 hours, or until the pasta is al dente. Mine was perfect right around 2.5 hours.
During the last 15-30 minutes, add the mozzarella cheese to the top and allow it to melt.
Serve alone or topped with red pepper flakes and served with garlic bread and a side salad.