I'm going to try to make a master post of all the quest info, since the mods are gone for the weekend and unlikely to edit the first post of the other thread. I *will* edit this post, so feel free to add things. I'll try to update from this thread and the main one as well.
Please note that in order to start these quests, you'll have to download the updates to RS2 on your device.
There are 3 quest lines with the current BBQ event. Two of them (The Summer Barbecue and A Side of Spuds) will require you to collect mustard from Uncle Sam, a new customer. Uncle Sam's visits are ~30 minutes apart and he will drop 1-4 mustards each time. Some have noted that Sam won't arrive if the game is left open, but will arrive immediately after closing and restarting. Mustards are stored in your pantry under the Seasonal tab and have a duration, which means they will disappear when the event expires.
New Recipes
Quests!
The Summer Barbecue
As Night Falls
A Side of Spuds
Mustard requirements
In order to complete The Summer Barbecue or A Side of Spuds, you're going to have to collect some mustard drops from Uncle Sam. Below are the calculations on how much you'll need for each.
A Side of Spuds
Potato Salad mastery level 1: 10-20 mustard, depending on Mastery Spice use
Potato Salad mastery level 2: 20-40 mustard, depending on Mastery Spice use
Potato Salad mastery level 3: 30-60 mustard, depending on Mastery Spice use
(NB: this last one is assumed until we get confirmation of the 3rd level of mastery)
Total: 60-120 mustard, depending on Mastery Spice use. You'd need 30 total Mastery Spice to use one every time.
The Summer Barbecue UPDATED
Unlock Hot Dogs: 9 mustard (3 BBQ Sauce)
Unlock BBQ Ribs: 36 mustard (12 BBQ Sauce, down from 60 mustards)
Unlock BBQ Chicken: 54 mustard (18 BBQ Sauce, down from 60 mustards)
Collect 25 BBQ Sauce: 75 mustard (note that these 25 can be used to unlock Bacon Burger, but the quest doesn't require the unlock, just the collection)
Total: 174 mustard, down from 204
To do both quests, you'll need between 234 and 294 mustard, depending on your use of mastery spice.