This week Zagat released its 2015 ratings for Boston restaurants, bars and bakeries. To celebrate those who took home the top prizes, Zagat is offering a week of free food at some of their biggest winners. Don’t miss the opportunity to devour a free maple bacon or sea-salted bourbon caramel donut at Union Square Donuts on Friday or a get a sweet treat at Flour Bakery Saturday. While you may have missed free grilled cheese at Roxy’s Gourmet Grilled Cheese, you can still grab a cone of fries at Saus on the house this Thursday. For more details, head over to Zagat.