Mashed Potatoes with broth

8 Tbsp. Unsalted butter 2 lrg Onions , thinly sliced 3 c. Cabbage thinly sliced 2 lb Russet potatoes , peeled, cut in 1" chunks 1/4 c. Half and half 2[...]

4 ounces bacon , cut into 1/2-inch pieces 2 tablespoons bacon fat 2 tablespoons butter 8 ounces turnips , peeled and cut into a 1/2-inch dice (about 1 1/2[...]