Slow Cooker Mashed Potato and Cauliflower with Cheese - Got Milk

Ingredients

• 3 pounds (about 3 large) – russet potatoes, peeled and chopped into 1-inch chunks
• 1 1/2 pounds – cauliflower florets (from 1 large head cut into 6 or 8 large chunks)
• 4 cloves – garlic peeled and minced
• 1 1/2 cups – milk, divided
• 1 cup – chicken broth
• 1 teaspoon – kosher salt
• 1/2 teaspoon – freshly ground black pepper
• 1 cup – shredded sharp Cheddar cheese
• 1/2 cup – mascarpone cheese
• 1/2 cup – grated Parmesan
• 4 tablespoons – salted butter
• 10-12 – large sage leaves