Chorizo Stuffed Mushroom Caps

Ingredients (10)

• 36 button mushrooms stems removed from caps
• 1 tablespoon olive oil plus more for the pan
• 1 cup thinly sliced onion
• 1/2 lb. spicy chorizo minced
• 3 cloves garlic minced
• 1/2 cup finely minced kale packed
• 2 tablespoons port wine or sub red wine
• Sea salt to taste
• 1/2 cup grated parmesan cheese
• 1 1/2 cups grated fontina cheese divided (see notes)