I saw the typo on preview, but it was too appropriate to fix. 
How about tomato sauce and mozzarella?
Unlike mayonnaise, which is made by emulsifying oil into egg yolks, aioli is made by pounding garlic into a paste and then gradually adding olive oil to the mixture
Aioli is not mayonnaise. Mayo can be made with a variety of vegetable oils; aioli requires olive oil. Mayo requires egg yolks; aioli may have them added but does not require them.
I’m still missing it. Yes, I know aioli is not mayonnaise. Wasn’t that also the point being made in the post you responded to? The poster was complaining about people who add stuff to mayonnaise and call it “aioli.” Garlic mayonnaise is not aioli. I think all three of us posters agree.
Ah. I see now what you mean. Sorry about the misunderstanding.
Memories from back in the Day…
Hehehe, knew that was gonna be “I Wanna be a Lifeguard”.
Ketchup does not belong in any discussion about food.
♫ Cheesy-Man, Cheesy-Man
♫ Does whatever a Cheese Head can
♫ Is he a hit? Is he a dud?
♫ All we know is he won’t drink ‘Bud’
♫ Hey there…! There goes the Cheesy-Man
♫ In the Dark of Night
♫ In your head thoughts will fill
♫ If you’re halfway bright
♫ Wonder “what was in that pill?”
♫ Cheesy-Man, Cheesy-Man
♫ Melts on bread right in your pan
♫ Should you eat? Are you Bored?
♫ Cooking is your reward.
♫ The Munchies are a hang up
♫ ( If you’re calling Dominoes, hang up )
♫ You’ll want the Cheesy-Man…!
The only thing that belongs anywhere near a grilled cheese is a bowl of tomato soup or bisque, with oyster crackers floating like little life rafts of crunchiness. Anything else is culinary blasphemy with a side of regret.
AKA: hot ketchup.
Sure, ketchup and tomato soup are basically the same—if you ignore little things like texture, temperature, seasoning, and the fact that one is a cold sugar paste designed for french fries, and the other is actual food. 
I would have agreed until yesterday. Yesterday I had a grilled cheese (Jarlsberg) with bacon jam inside. It was, as elderly children used to say, da bomb.
Dammit, now I want a grilled cheese sandwich.
I had one for dinner, along with some chicken noodle soup. Highly recommended.
(There was no ketchup involved.)
Aside request: What is bacon jam? How does one make it…?
It sounds like it’s a small bit of left-over bacon grease mixed with a large amount of a fruit preserve but I know I must be wrong. Left-over bacon grease is a roiling purgative, is it not?
< Will Wheaton stops his story >
“Yeah, Vern. That was the flavor of the pies.”
.
Lots of recipes online.
As ThelmaLou says, there are many recipes. All the ones I’ve seen start with chopped, cooked bacon.
I tried a recipe from online, once, and it was pretty good. It didn’t taste like the bacon jam in the sandwich, though. So if you don’t like one online recipe, you can try another.
Although, maybe it just tastes better with a grilled cheese sandwich around it.
Local place puts it on their smash-burgers. Pretty tasty stuff if you like sweet/salty notes.
No, it’s not bacon mixed with fruit jam. Based on the linked recipe (which, like many, hides the actual recipe part) it’s bacon with onion and garlic cooked in the bacon fat, then the pan is deglazed with vinegar, brown sugar is added, and the whole mess (bacon, aliums, sugar, vinegar) reduced to a jam-lile consistency.