Here ya go. Forgot to grab mushrooms, but it calls for them as well.
Spinach and Mushroom Filled Rolled Meatloaf
Super easy.
Throw some balsamic vinegar into a pan and bring it up to a boil. Once boiling, reduce heat and let it simmer and thicken for about 15 minutes, stirring as you go. It's ready to go when it starts to stick to the stirring spoon. I should have made it in the same pan I sautéed that the onions in to get some little onion chunks and flavor, but I was juggling a bunch of other stuff while I was cooking.