The Beyond Meatball Marinara sub is made with Beyond Meat's plant-based protein.

The Beyond Meatball Marinara sub is made with Beyond Meat's plant-based protein.

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Subway is testing out a meatless meatball sub. Here's why

Subway is exploring the plant-based protein trend with a meatless meatball sub. The sandwich chain will start selling the product, made with Beyond Meat's plant-based protein, at 685 restaurants in the United States and Canada next month. The Beyond Meatball Marinara sub will be available for a limited time.