Hawksmoor Air Street: Very well marbled bone-in sirloin cooked over charcoal, deliciously seared crust with very flavourful meat. If I ever had any preference for corn-fed beef, I've now completely converted to grass-fed. Mashed potatoes were on the firm side, so possibly whipped to toughen up the glutens, and served with a bit of thin gravy which is a nice touch, creamed spinach similarly good. The absolute best sticky toffee pudding in London from what I've tried; possibly steamed before serving, but not overly glutinous.
Pizza East (both Shoreditch and Portobello): My favorite pizza in London. Not an authentic Neapolitan type pie (which seem to be the standard at the minute). It has a chewy crust, a crispy base, and holds up well to toppings, (unlike Franco Manca et al which turn into a soggy mess). Starter of chicken livers with polenta is terrific, as is the bib lettuce salad (all salads are good, actually). Most similar to American style pizza I've found in London, though sadly not nearly as good as what is available in Pepe's in New Haven Connecticut.
Electric Diner: Hadn't been since the refurb, looks basically like Pizza East and all other Soho House group restaurants -- deliberately ratty and so NEW YORK! Some of the best chips I've had recently (my favorites are at Hix in Selfridges, and Tartine in Knightsbridge), and the home-made bolgona sandwich was quite good -- kind of a gross American classic done well -- not sure I'd order again but a good sandwich nevertheless.
Iberica Spanish Restaurant: Hadn't been for years as am seldom nearby and tend to eat Spanish at Dehesa/Fernandez Wells/Salt Yard type places. More choices than the standard Spanish menu offered at most places (i.e., Brindisa) and everything we ordered was terrific. Patatas Bravas were very crispy and light, as were cod fritters. Corn fritter with cheese & egg was a slightly unexpected but delicious preparation (i.e., cheese & egg 'sauce' on top of fried thin corn taco-like fritter). Slow cooked chicken with rice was absolutely delicious - a very large black chicken thigh on a bed of what tasted like spanish risotto.
Mari Vanna: Went with a group of friends after having already eaten 2 dinners, but was enticed to eat more. Delectable sturgeon, best perogi and polmeny i've eaten in London recently, truly outstanding herring in shuba coat (i.e., fur coat, basically herring covered with beets, apple, mayo, etc). Beef stroganoff was dry, though sauce was rich and flavourful -- using filet in a stew is bad idea.
Figured I'd mention a few places that aren't talked about that often here. This board tends to favour a few places and only recommend super top places -- the aforementioned spots are great restaurants for a casual supper and highly recommended for tourists who want a fun London experience.