Subway is already the world's largest restaurant chain. Now, they're working on appealing to a whole new kind of consumer: the vegan.

Animal advocacy organization, Compassion Over Killing, recently convinced Subway locations in Canada to sell a "Totally Vegged" vegan patty. Now, that effort has extended to select DC, Maryland and Virginia locations, via COK's "We Love Subway" campaign.

Until now, vegan Subway customers had been confined to the "Veggie Delight" sandwich: basically a pile of vegetables on one of their all-vegan breads, with condiments. This week, eight Beltway locations will roll out three new all-vegan sandwiches: Sweet Riblet, Malibu Greek and Italian Black Bean, giving the vegan Subway consumers of the world some protein on their subs.

We share Vegansaurus' sentiment on the matter: SANDWICHES FOREVER!

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America's Biggest Fast Food Chains

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  • 10. Sonic

    America's Drive-In rounds out the top 10 with U.S. revenues of $3.6 billion.

  • 9. KFC

    KFC, the biggest chicken vendor in America, comes in ninth with revenues of $4.7 billion, though there were 107 fewer outposts in August 2011 than there were the year before.

  • 8. Pizza Hut

    <a href="http://www.huffingtonpost.com/2011/07/27/pizza-hut-ads_n_911106.html" target="_hplink">Good ads</a> equal big revenues for the biggest pizza chain in America. Pizza Hut took in a solid $5.4 billion in 2010.

  • 7. Dunkin Donuts

    America runs on Dunkin' to the tune of $6 billion a year -- that's almost $20 for each and every person in the country.

  • 6. Taco Bell

    2010 U.S. revenues of $6.9 billion make Taco Bell the biggest Mexican restaurant chain in the country.

  • 5. Starbucks

    Starbucks may have had a few hiccups <a href="http://www.huffingtonpost.com/2011/07/13/starbucks-bistro-boxes_n_897768.html" target="_hplink">when it comes to introducing food</a>. But its success in beverages has propelled American's biggest coffee purveyor into fifth place among fast food chains, with 2010 revenues of $7.6 billion.

  • 4. Wendy's

    Wendy's fries may be <a href="http://www.slashfood.com/2011/04/20/wendys-fries-vs-mcdonalds-fries-taste-test/" target="_hplink">number one</a>, but its revenues aren't there quite yet.

  • 3. Burger King

    Number two burger chain Burger King was sold for $3.26 billion to 3G Capital in 2009. 2010 revenues of $8.6 billion make that sound like a deal to us! (We know, we know, there's a difference between revenues and profits...)

  • 2. Subway

    Subway has the most outlets of any fast food brand; it expanded that total by 816 in the past year alone. But because each store is relatively small, revenues, at $10 billion, pale in comparison with those at the number one chain.

  • 1. McDonald's

    With revenues standing at a whopping $32.4 billion in 2010, the Golden Arches aren't being dethroned any time soon. What's surprising about its success is that per store sales at McDonald's are bigger than those even cult-ish brands with fewer outlets. With $2.4 million <em>per store</em>, they're second only to Chick Fil-A, which fans travel miles to visit.