Portobellos Stuffed with Greens and Blue

Course Appetizers

Ingredients in this Recipe

1/2 cup crumbled Buttermilk Blue or other blue cheese
1/2 red onion, sliced
1/2 teaspoon fine sea salt, divided
1/2 teaspoon freshly ground black pepper
3 cloves garlic, finely chopped
4 large (4 to 5 inch) portobello mushroom caps, stems removed
8 cups chopped collard green leaves or other dark leafy greens (kale, mustard greens, turnip greens or a mixture), stems and tough ribs removed before chopping