Pot Roast ********* in Bacon and Onions
1. 3 tablespoons unsalted butter
2. 1/2 pound thick-cut bacon, cut into 1/2-inch pieces
3. 1 (2 1/2 pound) beef chuck roast, tied at 1-inch intervals
4. Kosher salt and freshly ground pepper
5. 3 pounds onions, very thinly sliced
6...