Green’s Dictionary of Slang

boiled beef or boiled mutton, or boiled potatoes.

a.1742		W. Somerville ‘The Fortune Hunter’ Canto III in Chalmers Eng. Poets (1810) XI 221/2: Then soon he mends his own apparel, Eats boil’d and roast, and taps his barrel.
1804		M. Edgeworth Popular Tales I 277: [He went] into the kitchen regularly every day, half an hour before dinner, to take a slice from the roast or the boiled before it went up to table.
1834		S. Smith Letters (1855) II 351: Tory and Whig in turns shall be my host, / I taste no politics in boil’d and roast .
1842		R. Barham ‘Reign of Queen Anne’ Ingoldsby Legends (1889) 419: Much fear’d, as the dinner had been so long ready, The roast and the boil’d [i.e. potatoes] would be all spoil’d.
1843		Dickens Christmas Carol (1868) 29: There was a great piece of Cold Roast, and there was a great piece of Cold Boiled.
1856		R.W. Emerson Eng. Traits 99: At his house in London six oxen were daily eaten [...] any acquaintance in his family, should have as much boiled and roast as he could carry on a long dagger.
1861		Dublin Eve. Packet 4 Sept. 1/2: Hot Luncheon of Roast or Boiled, 9d.
1885		R.F. Burton Book of Thousand Nights I 14: Fed thy famisht maw with his boiled and roast.
1915		T. Burke Nights in Town 399: His steak-and-kidney puddings at fourpence are better. I had one of these, garnished with ‘boiled and tops’.
1923		M. Garahan Stiffs 99: Cawfee, baby’s head small, boiled, no veg, two thick ’uns [...] boiled potatoes and two thick slices of bread and butter were placed before him.