Expected Behaviour
The toaster's recipes would not show up in the Roughly Enough Items interface when REI has only craftable recipes showing and the player does not have the input items for these recipes.
Actual Behaviour
When playing with Sandwichable and Roughly Enough Items, and the latter is set to only show craftable recipes in its interface, all of Sandwichable's toaster recipes show when the player does not have the items to make them, and even if the player's inventory is empty.
Steps to Reproduce

• Create a new world with the latest versions of Sandwichable and Roughly Enough Items enabled in 1.16.3.
• Open your inventory, click on Roughly Enough Items' setting button, and turn on the craftable filter button.
• Save and exit this interface, then open the inventory. Click on the craftable filter button.
• As the player has no items in their inventory, no items should appear in the right-hand interface. However, all of the items that can be created via toasting show up in this interface because their toasting recipes are identified as craftable.

I don't know if this is something you can set up configuration for, or if I would need to report this to REI's devs instead.