Fresh and Wild Mushroom Stew

Ingredients

• 1 1/2 pounds brown mushrooms, like shiitake, cremini or portobello
• 1/2 pound wild mushrooms, like chanterelle, or use King trumpet or oyster
• 4 tablespoons extra-virgin olive oil
• 1 large onion, diced
• Salt
• pepper
• 1 teaspoon chopped thyme
• 1 teaspoon chopped sage or rosemary
• Pinch of red-pepper flakes or ground cayenne
• 1 tablespoon tomato paste
• 3 small ripe tomatoes, peeled, seeded and chopped
• 1 tablespoon all-purpose flour
• 2 cups mushroom broth, heated, or use chicken or vegetable broth, plus more as necessary
• 1 tablespoon unsalted butter
• 3 garlic cloves, minced
• 3 tablespoons chopped parsley
• Polenta or pasta, for serving (optional)