Italian Wedding Soup refers to the "marriage" of flavors between the meat and veggies in the soup. This version uses frozen meatballs and veggies, which saves time without sacrificing the flavor.
Select saute setting on a 6-quart pressure cooker. Add butter and oil. Once the butter melts, add the carrots and the seasoning blend. Cook and stir until tender, about 3-4 minutes. Press cancel. Stir in stock, meatballs, soup, pasta, oregano, and pepper.
Lock the lid and close the pressure release valve. Pressure-cook on HIGH for 10 minutes. Allow pressure to naturally release. Stir in the spinach until wilted.