MIX flour and salt in large bowl. Cut in shortening until mixture resembles coarse crumbs. Add 1 of the eggs; mix well. Gradually add 2/3 cup water, stirring until mixture forms a ball. Wrap tightly; refrigerate while preparing the filling.
COOK and stir onions in dressing in large skillet on medium-high heat until tender. Add spinach and carrots; cook and stir 5 minutes. Remove from heat; cool. Stir in cheese.
ROLL out half of the dough on lightly floured surface to 1/16-inch thickness. Cut into 4-inch circles. Repeat with remaining dough. Spoon 1-1/2 Tbsp. of the spinach mixture onto center of each dough circle. Beat remaining egg; brush onto outer parts of circles. Fold dough in half to cover filling; press edges together to seal. Make a small cut in top of each empanada. Place on baking sheet; brush with any remaining egg.
BAKE at 375°F for 15 minutes or until golden brown.
Size It Up: Share these delicious empanadas with friends and help each other stick to the serving size.