Pasta with Cheese, Spinach and Corn

3 T orzo or other small pasta
1 T butter
1 T flour
1/2 c. milk
1/2 c. cheese
1/4 c. frozen spinach squeezed dry
2/3 c. corn

Make white sauce with butter, flour and milk. Stir until thickened. Add cheese. Puree spinach in sauce and pour over corn and cooked pasta