So they didn't just stop halfway through the movie to eat apple crumble, they made it as well.
How long does it take to make apple crumble? You might have to add that time to the 123 minutes duration of the film (while taking off the duration of the end credits as not many people sit through those in their homes) to get the time the meal finished. That would make it even earlier than Kevin's original estimate and put the time of death earlier also.
While this is true as far as it goes, even if Meredith finished her pizza at 18:35 and died at 21:05 that's still a t(lag) of 150 minutes which is very unusual - not unheard of, but three or four standard deviations away from the mean if I recall LondonJohn's maths correctly.
I'd venture to guess that "making" it meant microwaving it, or taking it our of the oven and serving it. It's just a guess, but you've got to balance out whether the extra t(lag) time is less improbable than the alternatives.
To clarify, a t(lag) of 150 minutes (as far as I can make out from what I've read) is very unlikely, but the fact that it's unlikely doesn't constitute proof beyond reasonable doubt that it happened for legal purposes. The figures of three hours or four hours seen quoted by figures like Dr Lalli, I believe, are the point at which the legal consensus is that you can be sure beyond reasonable doubt that if they were alive food would have started moving into the duodenum. So it's very unlikely but not impossible Meredith was alive at, say, 21:15. There's proof beyond reasonable doubt that she was dead by 21:30, or
maybe 22:30 depending on what sources you read, presumably depending on how many zeroes after the decimal point you feel you need in a p value before it turns into proof beyond reasonable doubt.
Either way, the most likely time of death is the earliest one consistent with her being attacked in her home, and any later time of death is less probable than that.
Taking into account Rudy's statement that he was there at 20:30 and had left by 22:00 (why would he tell that lie in particular if he had helped murder Meredith at 23:30?), the anomalous 22:00 phone calls, the anomalous 22:13 ping and the witnesses reporting that the house was dark and silent as far as anyone could see for the rest of the night, it's pretty much a slam dunk that Massei got it wrong and Meredith was murdered more like 21:10 than 23:30.
This also fits with Dr Lalli seeing cheese (which he thought might have been mozzarella) and vegetable fibres in Meredith's stomach contents: As far as I am aware it is exceedingly improbable that such recognisable materials would be present if she had lived to 23:30. (Massei report, p115).