Spicy quinoa salad with Chimichurri dressing and a cold-pressed apple, celery, beet, ginger, parsley, spinach and lemon concoction seem like a stretch for a chain that caters to the Slurpee and Big Bites crowd, but in an effort to appeal to discerning Millennials, 7-Eleven is giving these recipes - co-created with Tony Horton of P90X workout fame - a go in 104 L.A.-area stores.