Hand Mixing: Place spinach mixture in large bowl. Add flour. Mix thoroughly with fork until dough forms. (If dough is too dry, mix in enough water to make dough easy to handle. If dough is too sticky, gradually add flour when kneading.) Knead on lightly floured surface 5 to 10 minutes or until smooth and elastic. Cover with plastic wrap or aluminum foil. Let stand 15 minutes.

Food Processor Mixing: Add flour to spinach mixture in food processor. Cover and process about 10 seconds or until dough leaves side of bowl and can be pressed together with fingers. (If dough is too dry, add a few drops of water; cover and process 5 seconds. If dough is too sticky, add a small amount of flour; cover and process 5 seconds.) Remove dough and press into a ball. Cover dough with plastic wrap or aluminum foil. Let stand 10 minutes.

*1 package (10 ounces) frozen chopped spinach can be substituted for the fresh spinach. Cook as directed on package; drain thoroughly.