Crockpot Cheesy Mashed Potatoes with Caramelized Onions

Bahan-bahan (8 porsi)

• 5 pounds Russet or Yukon Gold potatoes, peeled and quartered
• 2 cups water
• 2 -4 cloves garlic
• 2 teaspoons kosher salt
• 1 stick (1/2 cup) salted butter
• 1 -2 yellow onions, thinly sliced or chopped
• 1/4 cup dry white wine
• kosher salt and black pepper
• 1 tablespoon chopped fresh thyme
• 8 sage leaves
• kosher salt and black pepper
• 1/2 cup sour cream
• 1/2 - 1 cup heavy cream
• 1 1/2 cups shredded gruyere cheese