Remove the stalks from the mushrooms and discard. Place the mushrooms stalk side up on a lined baking tray.
Season with salt and pepper and drizzle with the olive oil.
Place in the oven and bake for 15 minutes.
While the mushrooms are in the oven, place all the filling ingredients into a small food processor or blender and blend until it resembles a breadcrumb texture.
After 15 minutes, remove mushrooms from the oven and turn oven up to 200C/390F
Divide the pecan mixture between the mushrooms and push down with the back of a spoon to compact the filling.
Top mushrooms with grated cheese and place back in oven for a further 10-15 minutes or until cheese is golden and bubbly. Remove from oven and serve.
Notes
NOTE: THIS IS BASED ON THE INGREDIENTS WE USED, NUTRITIONAL INFORMATION MAY VARY DEPENDING ON THE INGREDIENTS USED.