Chicken au Gratin Potatoes with a Lightened-Up Cream Sauce

Ingredients

For 4 servings

• 2 lb mixed red and white potatoes (cut into bite-sized pieces)
• ½ medium white onion (roughly chopped)
• 2 tablespoons olive oil (divided)
• 1 teaspoon fresh thyme leaves
• 1 teaspoon sea salt
• ½ head cauliflower (roughly chopped)
• 2 cups chicken stock
• ¾ cup grated white cheddar cheese
• ¼ cup grated parmesan cheese
• 8 bone-in chicken thighs
• 2 cups kale (packed)