Yes, you can use your favorite recipe for homemade marinara sauce instead of jarred marinara sauce. In fact, we have a great recipe for u003cstrongu003eu003ca href=u0022https://crockpotladies.com/recipe/crockpot-marinara-sauce/u0022u003eHomemade Marinara Sauceu003c/au003eu003c/strongu003e that you can make in your slow cooker and freeze that is perfect for recipes just like this.