Need a quick and easy treat? Check. Prefer sweet over savory? Check. And would love it to be gluten-free? Check that box, as well. These macaroon sandwich cookies check all the boxes when it comes to easy, make ahead dessert treats. Perfect for a Passover celebration, these coconut macaroons do not contain any dairy.  Before you get started, line two baking sheets with parchment paper. Then whisk together your egg whites, salt, and sugar until frothy and stir in coconut and walnuts. Use a 1-Tablespoon ice cream scoop to drop macaroon mounds on the baking sheets and, with a slightly damp palm, flatten the cookies just a bit, then pop in the oven to bake. Once cookies have cooled, spread your jam on the flat side of one cookie and top with another. You can replace the strawberry jam with another fruit flavor or spread the cookies with melted (kosher-for-Passover) chocolate. Since you can can store these gluten-free coconut macaroons at room temperature for up to 3 days, you can get a jump on your holiday baking.