Bring first 3 ingredients to boil in large saucepan. Gradually whisk in polenta. Reduce heat and simmer until mixture thickens, stirring often, about 10 minutes. Add spinach and stir until wilted, about 2 minutes. Add cream and simmer until almost absorbed and polenta thickens, about 5 minutes. Add cheese and parsley; stir until cheese melts. Season to taste with salt and pepper. Transfer to bowl and serve.
Sold at Italian markets, natural foods stores, and some supermarkets.
