Grilled flank steak, sauteed shitake mushroom and roasted fingerling potatoes

I marinated everything separately in garlic and olive oil. I put in the potatoes first as they would take the longest. The meat and the mushrooms I began cooking fifteen minutes later. While the steak was grilling and done in ten minutes, I was sautéing the mushrooms for a few minutes and the potatoes were roasting in the oven. Dinner was done in forty minutes.