Subway's classic meatball sub is a go-to move when dining at the quick-service restaurant, and starting this September, there will be a meatless version on the test market.

Officially partnering with Beyond Meat, Subway will be putting together a plant-based version of the sandwich that will look, feel, and mostly taste the same as its meaty counterpart.

As Beyond fans know, the "meat" is typically packed with protein, and this sub is no different, carrying 24 grams of protein per six incher.

While the new meatless meatball sub won't be available at all Subway shops just yet, it will be available at 685 participating restaurants in the US and Canada, but only for a limited time trial.

The sandwich chain is already pretty veggie-friendly, but adding Beyond meat gives them a protein alternative that wasn't there before.