A healthier take on a French classic, potatoes Anna. This version is made with sweet and Yukon gold potatoes and swaps extra-virgin olive oil for butter.
1 1/2 pounds Yukon gold potatoes
1 1/2 pounds sweet potatoes, peeled
1 large yellow onion, peeled
Extra virgin olive oil
1 teaspoon thyme, chopped
2 cloves garlic, minced