Butternut Squash & Sage Lasagna - Kosher Kingdom

Ingredients

• 3 lbs cubed butternut squash
• 2 small yellow onions, chopped
• 6 cloves garlic, chopped
• 3 tablespoons olive oil
• 1 teaspoon Kosher salt
• 8 oz cream cheese
• 1 cup vegetable stock
• 4 tablespoons fresh chopped sage or 2 teaspoons dried ground sage
• freshly ground black pepper
• 1 lb oven-ready lasagna sheets
• 1 (8 oz) bag shredded mozzarella
• ½ cup grated Parmesan cheese