Rillettes are meat or poultry that has been chopped and shredded, seasoned, and preserved with fat. This is much like a confit—with the difference being that rillettes are shredded whereas for a confit, the meat is usually left whole.
Although rillettes were usually topped off and sealed with fat to preserve the meat, this faster version should be eaten within four to five days of cooking. If you’d like to keep them longer, you may need to melt and pour some lard on top of the ramekins. The Instant Pot makes quick work of what is ordinarily a long, long, really long process.