I almost always use fresh pasta when making lasagna, I also don't pre-boil the noodles. For the noodles I usualy use 1/2 head of spinach chopped in the food processor, a couple of cups of semolina, an egg or two, a bit of salt, and a little olive oil. If it's not coming together just add another egg, or some water. Let the dough rest for a bit then kneed it and roll it out with a rolling pin, if the dough is too wet just work some more semolina into it as you kneed/roll. The key to not having the bottom noodle come out like cardboard is putting enough sauce in the bottom of the pan before layering the rest of the ingredients in. I think it's also important to not let the pasta dry out before using it.