Getting 'The Path to Redemption' Feat without passing out was quite a chore in itself, but it's best done without going too deep into the Demon TF. That's because to get this Feat, you have to have Demon TF and then lose enough Demon TF points until your Demonic Manifestation is 0 (Demonicness score of 5 or less). Demonicness only drops by 1 point a day when you are above 0 Purity, so at bare minimum Demon TF, this means deliberately taking the huge Stress+++ hit from the 'terrible light searing through you' for 25 days (you need a Demonicness score of 30 points to get Demon TF). If you had gone all in Demon TF to 100 points, it'd mean enjoy your 95 days of constantly passing out from Stress just to get this Feat.
While DoLP has more ways to deal with Stress, this is certainly doable as well in vanilla if you know how to plan ahead around this. For instance, if you were sleeping when Midnight struck while your Purity was above 0, you still get slammed with the massive Stress+++ hit, but because you were asleep, part of that Stress hit is negated into Trauma instead. From observation, this translates to about 80-82%-ish of your Stress bar (for my DoLP character, anyway; guestimates based off the bar itself with no real measurement involved. I have the DoLP setting that makes Willpower make the Stress bar bigger, but the Stress gain from the 'searing light' feels % based as my character always gained enough Stress to hit 100%+ Stress if they weren't asleep at Midnight but otherwise was always +80-82%-ish if asleep). This means that if you were asleep with your Stress bar at 17% or so or less on Midnight, you'll be able to 'tank' the huge Stress hit. The main challenge is that because you need your Purity to be above 0, it means that any sort of sex that causes Purity loss is no good at all - unless you are part of the Temple and have access to the Prayer Room to get Purity that way. So can still use sex as a way to recover Stress, but no sticking things in places or tribbing (lest the juices mingle and you're back to 0 Purity again).
At least for my character I had an easier time with getting that Feat because in DoLP, there's a Feat for getting the Demon TF as a virgin. So as a lewd virgin, I just constantly masturbated in the Temple to 0 Purity and maintained it to get Demon TF, but then ended up paid for my crimes of desecrating holy ground by Virgo's reproachful piercing laser glare later back to humanity, I suppose. It'd be nice if there was another Feat to go from (Virgin) Demon to Angel, but there is no such Feat in DoLP, I think.
How do you make a hamburger for Avery? I made the bread but I can't figure out how to get onion and tomato in the same place. Avery' mansion has tomato but the orphanage has onion. I don't seem to be able too just take them with me to the other location.
For a reason like that, just cook something else. If you cook something Avery didn't request, you can tell them that you didn't cook what they requested because you were missing ingredient(s) and they'll start stocking it in their kitchen. But that only applies if it's not something you can buy from the Supermarket at the Shopping Centre - Avery will just give you money to buy from there instead. Note that Avery will still not like that you didn't cook what they wanted regardless.
In the case of Onions, they can only be obtained by growing them yourself if the kitchen doesn't have stock of them already, so Avery should start stocking it if you tell them that you were missing it.