Yasso, owned by Apollo Food Group LLC., Boston, launched three new flavors — coconut, mango and vanilla bean — to its line of frozen Greek yogurt bars. Each all-natural bar is fat-free, contains 80 calories and 6 to 7 grams of protein. They are also gluten-free. Sold in four-packs, the bars are available in grocery retailers nationwide with a suggested retail price of $4.99 to $5.49