Salisbury Steak with Mushroom Gravy plus Garlicky Mashed Potatoes & Carrots

Wash and dry produce.

Dice potatoes into ½-inch pieces. Peel garlic. Trim, peel, and cut carrots on a diagonal into ¼-inch-thick pieces. Thinly slice scallions, separating whites from greens; mince whites. Trim and thinly slice mushrooms (skip if your mushrooms are pre-sliced!).