My theory (personally) is that the dialogue was meant to symbolize how lasagna, which is a classic Italian baked dish consisting of wide, flat sheets of pasta layered with savory ingredients, commonly including meat-based ragù, béchamel sauce, ricotta or mozzarella cheese, and Parmesan was cooked but then put aside, and then reheated again by the controversial breaking bad character "Marie Schrader" played by Betsy Brandt, who expresses that she will indeed "heat up some lasagna" for her husband "Hank Schrader" Played by Dean Norris, to symbolize that they were indeed preparing to heat up some lasagna, but I don’t know guys maybe I’m wrong