Preheat the oven to 180C/350F.
Mince the garlic and onion. Thinly slice the mushrooms. Combine all of the meatloaf ingredients in a large bowl and knead with your hands until combined.
Stuff the meatloaf mixture in a 9 x 5" loaf pan.
In a small pot, combine the tomato sauce ingredients and simmer for a couple of minutes just to combine the spices. Pour over the loaf pan making sure nothing spills out. Place in the oven and bake for 50 minutes. Take it out of the oven and let rest 10 minutes. Serve and enjoy!!