Mix in 1 12 jars of spaghetti sauce and simmer about 2 minutes
Save the other 12 jar for breadsticks
Cook noodles as directed on package
Drain and cover with cold water until ready to use
Mix Cheddar and Mozzarella cheese together in large bowl
Grease or use cooking spray on 9 x 13-inch pan
Layer as follows
thin layer of sauce to cover bottom of pan drained lasagna noodles mixture of two cheeses noodles sauce and cheeses noodles sauce and cheeses Continue until all the mixture is used
Bake at 350 for 30 minutes or until bubbly
Let stand 10 minutes or so cut into squares and serve