Step 1

Cut the steak into roughly 2 inch/5cm dice.

Step 2

Cut the potatoes into dice smaller than 1 inch/2.5cm and the pepper and onion into a similar size.

Step 3

Pre-cook the potatoes either boiling or in the microwave until just cooked (boiled around 5min or 2min in microwave in a dish with some water).

Step 4

Mix together the oil, garlic, paprika, thyme, salt, pepper and lemon juice.

Step 5

Toss the steak, potatoes, onion and pepper in the oil mixture.

Step 6

Cut foil squares and divide the steak and vegetable mixture evenly between them.

Step 7

Seal up the foil packs and either cook on the grill around 10 min or in oven at 425F/220C around 20 min.

Step 8

Open up the pack and finish the steak either directly on grill or the whole pack under the broiler for a couple minutes to brown.

Step 9

Serve directly in the foil pack.