How to Make It
Preheat oven to 450º.
Place mushrooms and olive oil in a 10-inch skillet and toss until mushrooms are well-coated; season with salt and pepper. Add the water and cook over high heat for 10 to 12 minutes, stirring continuously, until mushrooms are softened and most of the liquid has evaporated. Add tomatoes, 2 tablespoons of the parsley, salt and pepper to taste, and cook for 5 minutes, stirring often.
While the sauce is cooking, lightly grease a baking sheet. Place polenta slices on sheet, then turn them over to coat both sides. Bake 5 minutes, turn polenta over with a fork, and bake for another 5 minutes.
Arrange hot polenta slices on serving plates, top with mushroom sauce, and sprinkle with parsley to garnish.
How kids can help: Older kids can slice the polenta; younger ones can sprinkle the dish with parsley.