1. While the potatoes are cooking, preheat your oven to 350 degrees. Heat the oil in a large pan over medium-high heat. Add the onion and cook for 5 minutes. Add the
mushrooms, carrots and whole herbs (rosemary, thyme and bay leaf –keep whole because you’ll be removing these later) and cook until they have released their liquid and are starting to brown, about 10 minutes.
2. Next make the gravy: add the garlic, tomato paste, almond flour and coconut aminos
(Worcestershire if not Whike30) stir to combine. Slowly start adding the vegetable broth and scrape all the browned bits off the bottom of the pan. Keep stirring until a gravy starts to form. Season to taste with sea salt and pepper. Let simmer over low heat for 2-3 minutes to get a nice thick gravy
3. Remove the herbs from the pan. Stir in the frozen peas. Transfer the mushroom shepherd's pie to an ovenproof baking dish. Top with the brown butter mashed potatoes and spread them evenly over the top. Bake in the oven for 20 minutes, or until it is hot and starting to bubble at the sides. Brush the mash with extra butter or spray with olive oil spray for a nice golden brown colour. Finish it off on broil to get it nice and brown on top.
4. Remove from the oven, garnish with fresh thyme and dig in!