Pre-heat your oven to 200 degrees.
Chop up your potatoes.
Place your potatoes into an oven proof dish and drizzle with olive oil. Season with salt and pepper.
Put your potatoes in the oven and set a timer for 20 minutes.
Slice the courgette. Chop and de-seed a red pepper. Chop up the red onion.
Drizzle olive oil on the salmon fillets and season with salt and pepper.
When your timer ends, take the potatoes out of the oven and add your courgette, red pepper and red onion to the oven dish. Drizzle with more olive oil and season with salt and pepper.
Mix up the vegetables so that they are evenly coated.
Place your salmon skin side up on the top of the vegetables and put the dish back in the oven. Set a timer for 20 minutes.
Check that the salmon is thoroughly cooked before eating. Enjoy!