Quark.- I’ve seen this in the store before but I didn’t find it at any of the local grocery stores. It is available on Amazon Prime but it’s crazy expensive and sounds like it’s more of a sour cream consistency. Edit: after posting this, I found another version on Prime cheaper than the original one I saw. I’m tempted to order it but it has similar reviews of not tasting the same as German Quark.

Update to the Quark: I found the former at our local specialty/ health store: Ellwood Thompson for a fraction of the cost from Prime. Even though it seems like it doesn’t taste the same as German Quark from the reviews, I’m still planning on giving it a shot.

Smoked Peppered Mackerel- Mostly our stores carry smoked salmon. This I had to purchase off of Prime.

Lamb’s Lettuce (Corn Salad)- I’ve never heard of this type of lettuce before and I looked it up and it doesn’t seem like it’s able to be cultivated in the States.

Gelatin Sheets- Mostly I’ve found Gelatin Powder in the store. Looks like you can substitute one teaspoon for one sheet, so an envelope of powder subbed for 2 sheets. You just skip the step for soaking the sheets since you can just pour the powder into the liquid.