Get your ingredients out and a food processor (thick slicer), then boil the kettle, put the oven on full whack (240°C/475°F/gas 9) and a lidded casserole pan on a high heat.
On a baking tray, season 4 x 250g whole trout with sea salt, black pepper and 1 tablespoon of oil. Cut 1 lemon into quarters, add to the tray and cook on the top shelf of the oven.
Slice 600g of new potatoes in the processor and put into the casserole pan with 1 litre of boiling water. Crumble in 2 chicken stock cubes, cover with the lid and boil.
In a bowl, mix 2 teaspoons of jarred grated horseradish, 1 teaspoon of English mustard, the juice from ½ a lemon and a small pinch of salt together, then ripple it through the yoghurt.
Slice up 2 little gem lettuces and finely chop the top leafy half 1 bunch of fresh mint.
Toss 1 bunch of thyme in 1 teaspoon of oil, then scatter the sprigs over the trout with 40g of flaked almonds.
Lay a piece of pancetta over each fish and put back into the oven for a few minutes, until golden and crispy.
Stir the lettuce, mint leaves, 300g of frozen peas and 200g of frozen broad beans into the potato pan.
Season to taste, cook for a couple of minutes, then serve with the crispy trout and mustard sauce.