Preheat the oven to 400°F (200°C).
Lay the potatoes on a sheet pan. Drizzle over the olive oil and sprinkle over 1/2 teaspoon of the salt.
Bake in the preheated oven for 10 minutes.
Add the asparagus, tomatoes and mushrooms to the sheet pan and stir.
Bake for a further 10 minutes.
Add the salmon fillets with a large knob of butter and a slice of lemon on top of each, and sprinkle over the remaining salt and some black pepper.
Bake for a further 10–12 minutes until the salmon is just cooked and serve. Recipe excerpted with permission from: <a target="_blank" href="https://www.amazon.com/gp/product/1849759367/ref=as_li_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=1849759367&linkCode=as2&tag=craftfocom-20&linkId=182bca601d775aacdb8be24911c185c4">Sheet Pan Cooking: 101 recipes for simple and nutritious meals straight from the oven</a>.