Mushroom and Goat's Cheese Burger

Meanwhile, halve, peel and thinly slice the red onion. Heat a drizzle of oil in a large frying pan on medium-high heat.

Once hot, add the onion, season with salt and pepper and fry, stirring occasionally, until golden, 8-10 mins.

Add half the balsamic vinegar and the sugar (see pantry for amount) and cook until caramelised, 1-2 mins more.

Transfer to a small bowl and set aside. Wipe out your (now empty) pan.

Remove the stems from the portobello mushrooms (but leave the mushroom whole).

Return the frying pan to medium-high heat with a drizzle of oil.

Once hot, add the mushrooms and season with salt and pepper. Fry until golden brown, 4-5 mins, then turn over and cook for a further 4-5 mins.

About 10 mins before the wedges are cooked, move them to the middle shelf of the oven.

Transfer the mushrooms, stem-side up, to another baking tray. Divide the goat's cheese between them, then bake on the top shelf until the cheese has melted, 8-10 mins.

Meanwhile, halve the ciabattas. For the last 3-4 mins, add them to the oven to toast and warm though.

Meanwhile, pop the remaining balsamic vinegar and a drizzle of oil into a bowl. Season withsalt and pepper, then mix together.

Just before the mushrooms are ready, add the pea shoots to the dressing and toss to coat.