Step 1

Put the olive oil, shallots and a pinch of salt in a large (12-inch) skillet and place over medium heat. Cook, stirring frequently, until the shallots are softened, but not browned.

Step 2

Add the mushrooms to the pan, Cook for about 5 minutes, or until they take on some color, then stir and add 1/2 teaspoon salt (this helps them release their water). Continue cooking until the mushrooms become tender and the liquid evaporates.

Step 3

Stir in the garlic, rosemary or thyme, chili, tomato paste, vinegar and butter. Add 1/3 cup of the stock or water and stir until the mixture becomes saucy, adding more liquid if needed.

Step 4

Serve the ragu over Parmesan Polenta with grated Parmesan.