1 Heat The Oil N A Heavy-Bottomed Saucepan Over Medium Heat. Add The Grated Onion And Cook, Stirring, Until Transparent, About 2 Minutes. Add The Corn Kernels And Cook, Stirring Occasionally, Until The Kernels Become Soft, About 5 Minutes. 2 Add The Milk, Water, And 1 Teaspoon Of The Salt. Bring The Mixture To A Boil Over High Heat. Whisk In The Grits, Decrease The Heat To Low, And Simmer, Whisking Occasionally, Until The Grits Are Creamy And Thick, 45 To 60 Minutes. Stir In The Butter, Parmesan, Parsley, And Chopped Green Onions. Taste And Adjust For Seasoning With Salt And Pepper.