For the mash
Peel and cube the potatoes. Bring a large pan of water to the boil and add the potatoes. Boil until soft then drain and mash. Beat in the single cream and wasabi paste. Check the seasoning and set aside with a lid on to keep warm.
For the sugar snap peas
Wash the snap peas and place in a microwavable bowl with 1 cup of water. Cover and microwave on high for 3 minutes. Drain and add to the plate.
For the tuna
On a plate combine the white and black sesame seeds, black pepper and sea salt. Put a griddle pan on high to heat up.
While the pan heats, wash the tuna steaks in cold water and pat dry with paper towel. Lightly role the ends in the sesame mixture, place on the hot griddle for two minutes each side. Squeeze lemon juice over the steaks while they cook.
Warm teriyaki sauce in microwave for 40 seconds in a dipping bowl, plate up all the elements of the dish and serve garnished with lemon wedges.
Hints and tips
Carefully rub each tuna steak, on both sides, with olive oil then coat with the sesame seed mixture.
Please note: this recipe has been created and uploaded by a member of the Tesco Real Food online community. Tesco does not test customer recipes so cannot accept responsibility for the content, validate the results or answer queries regarding them.