So talk about a delayed response.....
Those potato hash brown patties I was talking about are McCain. They have corn and soy in them, so I don't know if they would be off limits for your son (I forget what allergies you're dealing with).
If you do find suitable patties, my word of caution is that they're tricky to use as bread/buns. They fall apart easily one you put condiments on them and they are a bit messy to eat. Fine for me since I have bigger hands, but a LO might have some issues. 
Me: 35 I DH: 38
*TW loss and children mentioned*
DD:2006 | Dx: Unexplained Secondary Infertility | DS: 2011
TFAS since 2012
Oct 16: Spontaneous BFP | m/c @ 9w1d (massive SCH) | D&C
Apr 17: IUI #1 = BFN
May 17: IUI #2 = BFN
Jun 17: IUI #3 = Late BFP (18 DPO) | NMC 17Jul17 @ ~6w
Aug 17: IUI #4 = Cancelled due to premature ovulation | TI = BFN
Sep 17: IUI #5 = Cancelled due to overstimulation (10+ follies)
Nov 17: IVF #1 = Cancelled due to non-IF related health issue | TI = BFN
Dec 17: IVF #1 = Puregon 200, Menopur 75, Orgalutran, Suprefact trigger due to OHSS risk | 22R, 18M, 16F, 10B frozen
Feb 18: FET #1 (medicated) = BFN
Mar 18: FET #2 (natural cycle) = CP (beta 1: 54; beta 2: 0)
Apr 18: FET #3 (natural cycle) = cancelled due to missed ovulation
Apr 18: FET #3 (natural cycle) = BFP! Beta 1: 201 Beta 2: 585 Beta 3: 3254 Beta 4: 9715
U/S 19May - one bean measuring on track with a HB of 125!
EDD: 07Jan2019 Team Green
My Rainbow Baby Boy born 03Jan2019
Re: **Magdusia**
thanks for letting me know. My DS can't have soy. I actually tried making some hashbrown patties on my own recently and it was a huge fail so i'm going to try again. I just remember my house smelled like it was on fire for a day after i attempted to make hashbrown. lol.
Lol! this happens at my house quite frequently when my GF recipes don't turn out exactly as planned....
*TW loss and children mentioned*
Apr 17: IUI #1 = BFN
May 17: IUI #2 = BFN
Jun 17: IUI #3 = Late BFP (18 DPO) | NMC 17Jul17 @ ~6w
Aug 17: IUI #4 = Cancelled due to premature ovulation | TI = BFN
Sep 17: IUI #5 = Cancelled due to overstimulation (10+ follies)
Nov 17: IVF #1 = Cancelled due to non-IF related health issue | TI = BFN
Dec 17: IVF #1 = Puregon 200, Menopur 75, Orgalutran, Suprefact trigger due to OHSS risk | 22R, 18M, 16F, 10B frozen
Feb 18: FET #1 (medicated) = BFN
Mar 18: FET #2 (natural cycle) = CP (beta 1: 54; beta 2: 0)
EDD: 07Jan2019 Team Green
My Rainbow Baby Boy born 03Jan2019