Though I say it myself, I do make a mean Victoria sponge - shall be making one later to take (some of it, anyway) to some v elderly neighbours.
Other than that, my ‘signature’ dish is probably my Dustbin Soup (my mother’s term for a whatever-you-have). Like 3dognight’s version, it will vary every time, but will typically contain 10+ plant items, often including red lentils and pearl barley. But it’s not vegan, since I usually use chicken stock and serve with grated mature Cheddar.
Dh would probably say his favourite is my cauliflower/macaroni cheese combo, breadcrumbs and more cheese on top, browned under the grill.
Or my Thai-style chicken fried rice, with lightly stir fried veggies on the side - we had that last night.