Roasted Fingerling Potatoes, Mushrooms, Red Onions and Garlic

I know my roasting days are nearing an end because it's getting hot outside, so I've been busily roasting as much as possible while it's still cool in the evenings. This recipe contains all of my very favorite ingredients so you can imagine how much I loved this side dish. The potatoes were crisp on the outside and creamy inside, the onions and garlic were really sweet and the mushrooms were just