Delicata Squash Recipe with Nut Stuffing

Ingredients

• 1.5 tablespoons butter
• 1 medium yellow onion, finely chopped
• 2 cloves garlic, minced
• 0.5 teaspoon salt
• 1.5 teaspoons dried sage
• 2.5 tablespoons chopped walnuts
• 2.5 tablespoons chopped pistachios
• 2.5 tablespoons chopped almonds
• 2.5 tablespoons pine nuts
• 0.33333334326744 cup grated Parmesan cheese, plus extra for topping
• 2.5 tablespoons low-fat plain yogurt
• 1 large egg, lightly beaten
• 2 small delicata squash, halved lengthwise and seeded