*goes to egg your house but I find out you’re vegan so I ¼ cup of unsweetened applesauce your house instead*
Okay I hear you, but that’s not going to work. As always, when you’re thinking of vegan egg substitutes, it’s important to think about the purpose of the egg in your recipe.
Eggs are used in this recipe because they smell gross and don’t come off easily (due to their tendency to harden/cook in the sun). This is not a situation for applesauce, which will come off in a light rain.
While unconventional, the substitute you’re looking for here is sourdough starter. It’s goopy, it’ll smell atrocious in the hot sun, and it’ll harden onto the walls like cement. If you try to get it off with water, you’ll end up with a sticky dough.
Just make sure to respectfully ask your target if they have a gluten allergy before doing this - wouldn’t want to trade one evil for another.