Halcyon's List is odd, to say the least. Take "Sausage and Mash". They really meant Bangers and Mash... and Fried Onions and Gravy and Mushy Peas. Classic after-race Pub Grub. Not really a seagoing dish.
"Shepherd's Pie". What they probably mean is "Cottage Pie", made with ground or diced Beef. "Shepherd's Pie" is made with ground or diced Shepher.... Sheep. Nominally Lamb, but Mutton or even Goat works. Or canned Ham, Salt Pork, Corned Beef or canned Chicken or whatever.
The Recipe is more of a Principle than a list of ingredients. And the Principle is this: Root Vegetables and no refrigeration.
Root Vegetables needn't be refrigerated, except maybe in the Tropics. Such things as Potatoes, Yams, Carrots, Onions, Turnips, Parsnips, Celeriac, and the Radishes can be stored in a cool, dark, dry place for a long time; certainly weeks, along with Butter, Real Cheese, and waxed eggs. In the era before refrigeration, all sorts of foods were stored in a Larder or a Root Cellar, at home or at sea.
Deep, _dry_ Bilges are good.
Sea Pie
1 Lb. lean Meat, ground or diced
1 Lb. mixed Root vegetables, diced
1 small Onion
2 Lbs. Potatoes, mashed
~1/2 cup Meat Stock, depending on Meat
Oil, spices, tinned milk, butter, to taste.
Peel, Boil, and then Mash the Potatoes with maybe some salt, butter and enough milk. (Tinned Condensed works very well.) This is one dish where lumpiness doesn't matter much. Set to one side, if using only one Burner.
In a _heavy_ Skillet or Dutch Oven on your single Burner, heat a couple of Tablespoons of oil or butter until smoking slightly. Dice a small Onion, add, cover and brown for a couple of minutes, occasionally stirring.
Dice the Carrots, Parsnips and whatever, add to the Onions, cover and cook for another couple of minutes, occasionally stirring.
Add 1 Tin of diced or ground Corned Beef, (Just for example...), and stir around for another couple of minutes, and then add some Beef Stock mixed with a bit of the Mash for thickening, maybe a splash of Bottom Shelf Burgundy, and stir sufficiently, and cover for another couple of minutes. (Fresh Meats require more initial cooking time.)
About Spices: Corned Meats really don't need added Salt, but some fresh-ground Pepper is nice, and a smidgeon of Leaf Spices, like Bay added with the Root vegetables can be interesting. For variation, try some Chile or Curry Powder.
Once the Stock begins to simmer, top with the Mash, cover for a final time, and set to one side to finish cooking on its own, from the residual heat. ~15 minutes.
Note that most of the time, the cooking is done covered, which is important in choppy waters.
Some think that Presentation is everything, and they Present such "Pies" with scores cut in the Mash, and then sprinkled with Cheese and browned under a Broiler. It really doesn't matter much, and I never got that sprinkled Cheese thing anyway.
Serves 4-6 hungry Adults. Scoop some Pie onto a plate, and pour some of the Gravy over the Mash.
This is a good chance to have practiced your Skillet or Dutch Oven quick breads or biscuits just beforehand, so that some can be served still warm with the Pie. Here is a Trick- The metal Cover for the Skillet or Dutch Oven can be kept hot on a separate Burner when not in immediate use, so that heating occurs down as well as up.
¬Erindipity