Stuffed Chiles with Wild Mushrooms and Cilantro Sauce

Name: Stuffed Chiles with Wild Mushrooms and Cilantro Sauce
Ingredients: 4 poblano chiles; 1 pound fresh wild mushrooms (shiitake or oyster); 1 small red bell pepper; 1 small green bell pepper; 1 small yellow bell pepper; 1 tablespoon olive oil; Salt and freshly ground black pepper; Cilantro Sauce, recipe follows; 2 shallots; 1 cup dry white wine; 1/2 cup white wine vinegar; 1/2 lemon, juiced; 1 pound unsalted butter, cut into about 1-inch cubes; 2 tablespoons minced fresh cilantro leaves