Cut 5 (12-inch) squares of foil. Tightly roll each into log about 12 inches long by 1 inch in diameter. Place on cookie sheet, and spray logs well with cooking spray. Unroll and cut 7 phyllo sheets into 3 (4-inch) pieces each, making 21 pieces (you will use 20 of them). Spray 1 side of each of 2 pieces with cooking spray. Place pieces sprayed sides together, and roll up on half of 1 foil log to make 1 cannoli shell. Spray top of shell with cooking spray, and sprinkle with 1/2 teaspoon granulated sugar. Repeat on other half of log to make second cannoli shell on log. Continue for total of 5 logs with 2 cannoli shells on each.