Just off the top of my head ...
Ground beef, bone-in cuts of beef, veal, lamb, like chuck steak, marinated & roasted lamb shanks, beef short ribs.
Pressure cookers actually save energy, and in 45 minutes you can extract much of the collagen and bone marrow, comparable to a 3 hour boil. For this you can use beef or lamb neck or cut shanks (all are cheap). Chicken wing tips especially, just scoop out the solidified PUFA off the top when it cools. Buy glass bowls with lids and use them to freeze the excess. Otherwise it should keep in the fridge for at least 4-5 days depending.
Throw peeled potatoes into a juicer to extract their keto-acids, the starch will eventually settle to the bottom, keep or toss. Boil for 30-45 minutes in a stew or fry in your favorite oil. Research the old RP forum for more info on this.
White rice is ok if cooked well.
Nixtimalized corn aka masa harina or tortilla wraps. The key word to look for on the ingredients list is slaked lyme aka calcium hydroxide.
Certain saturated fats are satiating, like butter or beef tallow, you wouldn't need much.
Good cheeses.