This flank steak sandwich is a real two-hander -- juicy and garlicky and fragrant. One big batch of chimichurri marinates the steak and also gets swirled in to flavor the quickie aioli. SUBSCRIBE TO FOOD52 ►►http://bit.ly/2f1wNmqINGREDIENT LIST (Serves: 4)1 1 1/2 to 2-pound flank steak1 cup flat leaf parsley cleaned and large stems removed, finely chopped (by hand or use food processor)1/2 cup baby arugula, finely chopped (by hand or use food processor)2 cloves garlic, minced (you can add to parsley and arugula in food processor)1/4 teaspoon dried oregano1/4 teaspoon crushed red pepper flakes1/2 cup 2 tablespoons olive oil2 tablespoons red wine vinegar1 brioche pullman loaf or if you prefer a white pullman loaf1/4 cup mayonnaise1 beefsteak or heirloom tomato, slicedSoft butter for breadSalt and pepper to tasteFULL RECIPE ►► https://f52.co/2rim7GBCONNECT WITH FOOD52Web: https://food52.comFacebook: https://www.facebook.com/food52Instagram: https://www.instagram.com/Food52Pinterest: https://www.pinterest.com/food52Twitter: https://twitter.com/Food52Food52 newsletter: https://f52.co/newsletterABOUT FOOD52As a one-stop shop for joyful living, F52 connects discerning home cooks with the interests they're passionate about via award-winning food and lifestyle content across platforms. We provide our audience with the recipes and solutions they crave to eat thoughtfully, live joyfully, entertain beautifully, and travel differently.