Heat olive oil in a large cast iron pan. Combine potatoes, sweet potatoes, carrots, radishes, and shallots in a large bowl. Season with balsamic vinegar, salt, and pepper and toss to combine.
Cook vegetables in the cast iron pan for 20-25 minutes over medium heat, stirring occasionally.
During the last 5 minutes of cooking add minced garlic to the pan and stir to combine. Once the vegetables are golden and cooked through, remove from heat and sprinkle with fresh thyme.
Recipe by at https://www.adventuregathereat.com/root-vegetable-skillet-hash/