Butternut Squash and Kale Strata Is the Perfect Fall Dish

Name: Butternut Squash and Kale Strata Is the Perfect Fall Dish
Ingredients: 16 ounces ( 12 cups) sourdough bread; 3 tablespoons olive oil; 2 teaspoons garlic powder; 2 teaspoons dried ground sage; 1/2 teaspoon black pepper , more to taste; 6 large eggs; 2 1/2 cups whole milk; 1 (15-ounce) can pumpkin puree; 1 teaspoon turmeric (optional); 1 teaspoon salt; 1 pound butternut squash , peeled and diced into 1/2-inch cubes; 1 bunch ( 2 cups shredded) kale; 1 cup Swiss cheese , shredded; 1/2 cup Parmesan cheese , grated; Fresh sage leaves, for garnish (optional)