For busy oven days or busy days in general, this slow cooker three meat lasagna will take the stress out of meal preparation. After preparing the rich meat sauce and assembling the rest is up to my personal chef, a. K. A my slow cooker. The slow cooker simmers the rich and meaty marinara sauce with uncooked lasagna noodles to tender perfection. Layers of seasoned ricotta cheese, slices of spicy pepperoni and lots of gooey cheese complete the ensemble. It will make you think you're dining at an italian restaurant instead of at your own kitchen table.