Good uses for saved fat -
Anything that needs oil or fat!
I like to fry Brussels sprouts in it. Using it instead of a purchased oil, you get whatever tasty seasonings may already be in the fat. The sprouts recipe I found is 5 tbsp (75 g) fat or oil per pound of sprouts, which I buy frozen. Measuring cold fat into a pan is easy when I put the pan on a scale.
When doing ribs in a crock pot, I like to sear the ribs first. Put a couple blobs of saved fat into the searing pan. I try to preheat everything that goes into the crock pot because otherwise, it takes forever to heat up.
Bone broth -
Mine comes from the meat juices I salvage after slow cooking ribs or any meat with bones in it. So it has some flavor from the mushrooms and onions I usually add to those dishes, plus some salt and spices.
I have a chili recipe that calls for broth to be added. I use the saved broth for that.
I’ve also made a soup from the broth base. Add anything you like of course. I’ve added pearl onions, mushrooms, and bits of meat. I think my broth is pretty concentrated so for soup, I might add some water. Halved Brussels sprouts would be good too. Halved radishes. After cooking, radishes are a lot like potatoes but without the carbs. I often toss them into a slow cooker dish.