Delicata Squash Recipe with Nut Stuffing

Ingredients

• 1 1/2 tablespoons butter
• 1 medium yellow onion, finely chopped
• 2 cloves garlic, minced
• 1/2 teaspoon salt
• 1 1/2 teaspoons dried sage
• 2 1/2 tablespoons chopped walnuts
• 2 1/2 tablespoons chopped pistachios
• 2 1/2 tablespoons chopped almonds
• 2 1/2 tablespoons pine nuts
• 1/3 cup grated Parmesan cheese, plus extra for topping
• 2 1/2 tablespoons low-fat plain yogurt
• 1 large egg, lightly beaten
• 2 small delicata squash, halved lengthwise and seeded