Your own BBQ sauce
To make the BBQ sauce, place all the ingredients into a pot and place over a medium heat, bring to a simmer and stir well to combine the sauce together. Allow to cook for 10 minutes, remove from the heat and pour into a clean glass jar and allow to cool. Keep the leftover sauce in the fridge and it will keep for up to 4 weeks.
#### The perfect fillet steaks
Place the steaks onto a plate or tray, drizzle over the olive oil and sprinkle over a good pinch of sea salt, massage this into the steak and allow to sit to come to room temperature.
Place the potatoes into a large pot of cold water, season with a good pinch of sea salt. Place over a high heat and bring to the boil. Cook for 12 to 15 minutes or until just cooked through. Remove from the heat and strain, set aside and allow to cool slightly, then cut in halves or quarters.
Place a griddle pan or BBQ grill plate on a high heat, once this is hot, sear the steak on both sides for 4 to 5 minutes for medium (this timing will depend the thickness of your steaks or how you like to eat your steak – less time for rare and more time for well done).
Remove from the griddle and place in a warm spot on a plate to rest for 6 to 8 minutes.
Meanwhile, place a large non stick frying pan over a high heat. Add the butter, and once it starts to turn nut brown, add the potatoes and rosemary, season with a good pinch of sea salt. Continue to cook and toss the potatoes until they are golden brown and are starting to go crispy.
#### Serve it up
To serve, slice the steak across the grain and place onto the serving dishes along with the potatoes and rocket, drizzle with olive oil and season to taste, serve with your homemade BBQ sauce.