Step 1

Make the garlic butter: Pulse the garlic in a food processor until chopped. Add the butter, lemon zest, lemon juice, parsley, 1 teaspoon salt and 1/2 teaspoon pepper; pulse until smooth. Chill at least 30 minutes.

Step 2

Prepare the mushrooms: Preheat the oven to 400 degrees F. Toss the mushrooms with 1 tablespoon olive oil and season with salt. Fill each mushroom with 1 heaping teaspoon of the garlic butter (reserve the remaining garlic butter for the crab filling). Arrange the mushrooms snugly in a baking dish and bake until tender, about 15 minutes.

Step 3

Meanwhile, heat the remaining 1 tablespoon olive oil in a skillet over medium heat. Add the shallot and crabmeat; cook until the shallot is soft, about 3 minutes. Stir in the wine and cook until slightly reduced, about 1 minute. Stir in the reserved garlic butter (about 1/3 cup) until melted. Season with salt and pepper. Remove from the heat and push the crab mixture to one side of the skillet; let any excess juices collect.

Step 4

Remove the mushrooms from the oven and preheat the broiler. Stuff the mushrooms with the crab mixture. Toss the panko with the juices in the skillet; sprinkle over the mushrooms. Broil until golden, about 2 minutes. Squeeze lemon wedges on top.