Step 1

Cook gnocchi as directed on package, omitting salt.

Step 2

Meanwhile, heat oil in large skillet on medium heat. Add onions; cook 3 min. or until crisp-tender, stirring frequently. Remove from heat. Blend cream cheese and pesto sauce in blender until smooth. With blender running, gradually add milk through feed tube at top of blender, mixing well after each addition. Add spinach; blend until smooth. Blend in onions. Pour into skillet.

Step 3

Drain gnocchi. Add to cream cheese mixture; stir until gnocchi is evenly coated with sauce. Cook 2 to 3 min. or until heated through, stirring constantly. Remove from heat. Top with Parmesan and tomatoes.