Creamy Leek and Mustard Chicken Breast
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Creamy Leek and Mustard Chicken Breast

Creamy Leek and Mustard Chicken Breast

with Peas and Parsley Mash

This Creamy Leek and Mustard Chicken Breast is bursting full of flavours and makes the perfect dinner night option from HelloFresh. Cook up a fresh start!

Calorie Smart

Boxes and ingredients are packed in facilities that handles Peanut, Nuts, Sesame, Fish, Crustaceans, Milk, Egg, Mustard, Celery, Soya, Gluten and Sulphites. Due to the war in Ukraine, it has been necessary to substitute sunflower oil with rapeseed oil in some products without a label change. The FSA have advised that allergic reactions to rapeseed oil are rare.

Preparation Time30 minutes
Cooking time20 minutes


serving amount

450 grams


2 unit(s)

British Chicken Breasts

1 unit(s)


2 unit(s)

Garlic Clove

1 bunch(es)

Flat Leaf Parsley

10 grams

Chicken Stock Paste

75 grams

Creme Fraiche

(Contains Milk)

120 grams


17 grams

Wholegrain Mustard

(Contains Mustard)

Not included in your delivery

100 milliliter(s)

Water for the Sauce


Nutritional information

Energy (kJ)2415 kJ
Energy (kcal)577 kcal
Fat17.9 g
of which saturates8.8 g
Carbohydrate59.5 g
of which sugars11.6 g
Protein50.7 g
Salt1.62 g
Always refer to the product label for the most accurate ingredient and allergen information.


Baking Paper
Medium Saucepan
Large Saucepan
Garlic Press
Potato Masher


Get Prepped

Bring a large saucepan of water with 1/2 tsp salt to the boil for the potatoes.

Chop the potatoes into 2cm chunks (no need to peel).

Sandwich each chicken breast between two pieces of baking paper or cling film. Pop onto a board, then give it a bash with the bottom of a saucepan until it’s 1-2cm thick. IMPORTANT: Wash your hands and equipment after handling raw chicken and its packaging. 

Sear the Chicken

When your pan of water is boiling, add the potatoes and cook until you can easily slip a knife through, 15-20 mins. 

Meanwhile, heat a drizzle of oil in a large frying pan on medium-high heat.

Once hot, lay the chicken breasts flat in the pan and season with salt and pepper. Fry until browned on each side and cooked through, 5-6 mins each side. IMPORTANT: The chicken is cooked when no longer pink in the middle.

Bring on the Veg

Meanwhile, trim the root and the dark green leafy part from the leek. Halve lengthways, then thinly slice.

Peel and grate the garlic (or use a garlic press). Roughly chop the parsley (stalks and all).

Once the chicken is cooked, transfer to a plate and cover to keep warm.

Give it a Fry

Pop the (now empty) pan back on medium heat with a drizzle of oil if it's a bit dry.

Once hot, add the leek and season with salt and pepper. Cook, stirring occasionally, until softened, 4-6 mins, then add the garlic and cook for 1 min more.

Nestle the chicken back into the pan. Stir in the chicken stock paste and water for the sauce (see pantry for amount), bring to the boil, then turn the heat down and simmer until the sauce has thickened, 2-4 mins.

Make your Mash

Meanwhile, once the potatoes are cooked, drain in a colander and return to the pan, off the heat.

Add a knob of butter and a splash of milk (if you have any) and mash until smooth.

Stir through half the parsley and season with salt and pepper. Cover with a lid to keep warm.

Finish and Serve

When everything's cooked, stir the creme fraiche, peas and mustard into the chicken pan until combined and piping hot, 1 min.

Share the parsley mash between your plates and top with the chicken, spooning over all the creamy sauce. 

Finish with a sprinkle of the remaining parsley.


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