I love meat guys. (Trust me, when I was a kid, my family called me “little carnivore” for good reason). But there is a point at which your lasagna won’t be well balanced if you add too much meat. A good rule of thumb is about 1 or 1 and 1/2 pounds of meat for one casserole dish. If you want to push the boundaries, the lasagna police aren’t going to arrest you (at least I hope not) but you may find that the meat overwhelms the noodles, cheese, and sauce.