For the purpose of adding hearts, all of the gregtech foods (such as the various sandwiches, pizzas, potatoes on sticks, bread items, etc.) seem to be counted as the same item.
Looks like this is because they're all the same item ID, and use metadata changes to distinguish between them.
Oddly doesn't apply to the diminishing returns, only to the extra hearts.
For the purpose of adding hearts, all of the gregtech foods (such as the various sandwiches, pizzas, potatoes on sticks, bread items, etc.) seem to be counted as the same item. Looks like this is because they're all the same item ID, and use metadata changes to distinguish between them. Oddly doesn't apply to the diminishing returns, only to the extra hearts.