My vegan mushroom hotpot is loaded with chunky mushrooms and dried porcini mushrooms in a gravy flavoured with mushroom ketchup... so if you don't like mushrooms... oopsie! It's then topped with potatoes and baked in the oven.
Cut the onion in half, peel it, and then cut it into a 1cm (½") dice.
Heat a 30cm or 12" frying pan over a medium-high heat and add two tablespoons of the olive oil, then cook the onions for 10 minutes, stirring occasionally.
Cut the mushrooms into bite-sized pieces.
Peel and thinly slice the garlic cloves.
When the onions have softened, add the mushrooms, turn the heat up to high and fry them for 10 minutes, tossing them occasionally.
Whilst the mushrooms are cooking, pour the boiling water over the dried mushrooms and allow them to steep for 10-12 minutes.
Throw the garlic into the pan and cook for a minute.
Add the flour, salt, pepper and thyme to the pan and cook for another minute.
Strain the steeping liquid from the dried mushrooms into the pan, add the mushroom ketchup and vegetable stock and stir.
Roughly chop the dried, soaked mushrooms, add them to the pan, reduce the heat to low and allow the mushrooms to simmer gently whilst you prepare the potatoes.
Cut the potatoes into 5-6mm (¼") thick slices and place them in a bowl, then drizzle over the remaining tablespoon of oil and toss them to coat.
Divide the mushrooms between two 15cm (6") x 10cm (4") baking dishes, then top them with a layer of potatoes, and sprinkle with coarse sea salt. Then bake them for 40-45 minutes at 180°C or 350°F.
Then slide them under the grill for 4-5 minutes to get the potatoes nice and crispy on top.