Mushrooms with lemon thyme and fetta

4 large field mushrooms
1 tbsp olive oil
3 cloves garlic, finely chopped
1 bunch lemon thyme, sprigs removed
1 cup breadcrumbs
125g fetta, crumbled
1/2 cup toasted walnuts, finely chopped

1. Remove the stalks from the mushrooms, chop finely and place in a bowl. Brush the base of each mushroom with olive oil. Add the garlic, lemon thyme, breadcrumbs, fetta and walnuts to the chopped mushroom stalks, mix to combine.
2. Cook the mushrooms oil side down ona preheated medium-high bbq for 1-2 mins. Turn mushrooms and fill with breadcrumb mixture, cook for 1-2 mins longer. Serve immediately.