1 tsp wasabi powder
2 tsp Dijon mustard
1 tsp water
1/2*tsp freshly ground black pepper
1/2*tsp coarse salt
1 tbsp peeled and finely chopped fresh ginger
1 tbsp peeled and finely chopped garlic
1 ½ tbsp groundnut oil, plus more for cooking
450g highest-quality tuna, cut into 2.5cm pieces...I use steaks. GP apparently fishes for the things herself...
2 tbsp extra virgin olive oil
3 shallots, peeled and thinly sliced
4 wholemeal hamburger buns
Handful fresh rocket
For the soy & sesame mayonnaise:
125ml mayonnaise
2 tsp soy sauce...but I use wasabi!
2 tsp toasted sesame oil
Method
1. Combine the wasabi, mustard and water in a small bowl. Scrape it into a food processor along with the pepper, salt, ginger, garlic and groundnut oil. Pulse it all together to make a flavourful paste. Add the tuna and pulse just to combine – be careful not to over-process the tuna as you want your burgers to have texture.
2. Form the mixture into four burgers and set in the refrigerator for at least an hour (up to overnight) to let the flavours really settle in.
3. Meanwhile, heat the olive oil over medium-high heat in a frying pan. Add the shallots and sauté for about 10 minutes, until they get soft and sweet and a little brown. Reserve.
4. Preheat your barbecue or griddle pan over high heat. Rub the tuna burgers with a little groundnut oil and grill for two or three minutes a side, until they are cooked to your preference. Grill the buns alongside the burgers.
5. Whisk all the ingredients for the soy (Or my wasabi) & sesame mayo together and spread over the buns. Pile on the sautéed shallots and a bit of rocket.
I also add pickled ginger on top!
It's another...dare I say it...Paltrow! Makes enough for four...