Artichoke & Parmesan Stuffed Mushrooms

Position rack in upper third of oven; preheat broiler to low. Coat a 9-by-13-inch metal baking pan with cooking spray.

Remove and finely chop mushroom stems. Heat 1 teaspoon oil in a medium skillet over medium heat. Add the stems, shallot and garlic and cook, stirring, until the liquid is evaporated, about 5 minutes. Transfer to a bowl and stir in artichoke hearts, 2 tablespoons breadcrumbs, Parmesan, mayonnaise and thyme.

Toss the mushroom caps in another bowl with 2 teaspoons oil, salt and pepper. Stuff each with filling and place in the prepared pan. Combine the remaining 1 tablespoon breadcrumbs and 1 teaspoon oil and sprinkle on the mushrooms.

Broil on the upper rack until the mushrooms are soft and the breadcrumbs are golden, 15 to 20 minutes.