Sear the trimmed tenderloin in a frying pan.

NextDice the onion and cook it in a frying pan with oil over a low heat. Cut the leek into small pieces and add it.

Dice the onion and cook it in a frying pan with oil over a low heat. Cut the leek into small pieces and add it.

NextWhen the onion is translucent, add the red pepper and garlic and leave for 3 or 4 minutes.

When the onion is translucent, add the red pepper and garlic and leave for 3 or 4 minutes.

NextAdd the courgette and let it cook for another 3 or 4 minutes. Season with salt to taste.

Add the courgette and let it cook for another 3 or 4 minutes. Season with salt to taste.

NextBlanch the tomatoes for 20 seconds, peel them, dice them and add them to the vegetables.

Blanch the tomatoes for 20 seconds, peel them, dice them and add them to the vegetables.

NextPut the washed potatoes in a deep dish and microwave them, covered, on full power for about 4 minutes.

Put the washed potatoes in a deep dish and microwave them, covered, on full power for about 4 minutes.

NextPut the tenderloin in a baking dish surrounded by the vegetables, with some on top too. Arrange the potatoes around it, sliced not too thickly, with salt to taste and a drizzle of olive oil.

Put the tenderloin in a baking dish surrounded by the vegetables, with some on top too. Arrange the potatoes around it, sliced not too thickly, with salt to taste and a drizzle of olive oil.

NextBake for about 30 min. After 15 min, turn the potatoes and the tenderloin.

Done! A great dish full of flavour, juicy and healthy.