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21 Day Aged Steak & Caramelised Onion Baguette

21 Day Aged Steak & Caramelised Onion Baguette

with Cheddar and Roasted Garlic Mayo | Serves 2
Recipe Development Team
Recipe Development TeamUpdated on April 01, 2026
Calories
495 kcal
Protein
44.4g protein
Total
30 minutes
Difficulty
Easy
Allergens:
  • Cereals containing gluten
  • Sesame
  • Soya
  • Milk
  • Egg
  • Mustard
  • Lupin
  • Milk
  • Nuts
  • May contain traces of allergens
Produced in a facility that processes eggs, milk, fish, peanuts, sesame, shellfish, soy, tree nuts, and wheat.
serving amount

2 unit(s)

21 Day Aged British Rump Steaks

1 unit(s)

Onion

3 unit(s)

Garlic Clove

1 unit(s)

SlooOW Stone Oven White Baguette

(Contains: Cereals containing gluten, Sesame, Soya May contain traces of: Lupin, Milk, Nuts)

60 grams

Mature Cheddar Cheese

(Contains: Milk)

64 grams

Mayonnaise

(Contains: Egg, Mustard)

20 grams

Wild Rocket

Not included in your delivery

½ tsp

Sugar

Energy (kJ)2069 kJ
Energy (kcal)495 kcal
Fat25.8 g
of which saturates9.8 g
Carbohydrate22.3 g
of which sugars7.3 g
Dietary Fibre2.1 g
Protein44.4 g
Salt1.6 g
Always refer to the product label for the most accurate ingredient and allergen information.
Large Frying Pan
Bowl
Baking Tray
Pan
Aluminum Foil
Grater

Instructions

Caramelise the Onion
1

a) Preheat your oven to 220°C/200°C fan/gas mark 7. Remove the steaks from your fridge to allow them to come up to room temperature

b) Halve, peel and thinly slice the onion. Heat a drizzle of oil in a large frying pan on medium heat. Once hot, add the onion, season with salt and pepper and fry, stirring occasionally, until golden, 10-12 mins. 

d) Meanwhile, pop the garlic (unpeeled) into a small piece of foil with a drizzle of oil and scrunch to enclose it.

Bake the Bread
2

e) Remove the bread from the packaging and pop onto a baking tray along with the garlic parcel.

b) Bake on the top shelf until the bread is toasted and golden and the garlic has softened, 10-12 mins.

c) Once the onion has softened, ad the sugar (see pantry for amount) and cook until caramelised, 1-2 mins more.

d) Once caramelised, remove the onion from the pan into a small bowl. Keep the pan for the next step.

Fry your Steaks
3

a) Add a drizzle of oil to the large frying pan and return to high. Season the steaks with salt and pepper. TIP: Rump steaks naturally vary in shape, so adjust the following timings depending on how you like yours cooked.

b) Once very hot, lay the steaks into the pan and fry until browned and medium-rare, about 5 mins. Turn halfway through. TIP: Cook each side for 1 min more if you like it more well done. IMPORTANT: Wash your hands and equipment after handling raw meat. It's safe to eat when browned on the outside.

c) Once cooked, transfer to a board, cover with foil and allow to rest for a couple of mins, then cut into bite-sized pieces.

Slice the Bread
4

a) Once the steaks have cooked, transfer to a board,
cover with foil and allow to rest for a couple of mins,
then cut into bite-sized pieces.

b) While the steaks rest, grate the cheese.

c) Once baked, allow the bread to cool for 5 mins, then
slice it in half once lengthways and again widthways.

 

Make the Garlic Mayo
5

a) Once the garlic has cooked and cooled, cut the end with scissors, squeeze it out of the skin and mash with a fork.

b) In a small bowl, mix the garlic and mayo, then season with salt and pepper.

Build your Sandwich
6

a) Spread the roasted garlic mayo over each lid and base of the baguette.

b) Top each base with the caramelised onion, followed by the steak.

c) Arrange the cheese on top of the steak cheese and, if you'd like to, place back into the oven until the cheese has melted, 2-3 mins.

d) Top the cheese with the rocket, then finish with the lids. Share between 2 serving plates.

Enjoy!

Customer reviews

Review summary

Updated on Feb 2026
  • Flavour: The caramelised onion, cheese, and garlic mayo combination was delicious, though some found the steak lacking in taste.
  • Ease of prep: Cooking requires careful timing coordination; consider reducing steak cooking time to 3 minutes per side for better results.
  • Suggestions: Add mustard for extra flavour; serve with chips on the side for a heartier meal.
  • Next-day meals: The sandwich doesn't keep well for day-two consumption; best enjoyed fresh.
AI-generated from customer reviews

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