Preheat oven to 350F and lightly grease a 9x13 baking pan.
Place the bread crumbs, garlic powder, salt, pepper, Teriyaki sauce and eggs into a large mixing bowl. Stir well, then let rest for 5 minutes.
Add the ground beef and mix well by hand till all the bread crumb mixture is fully mixed in. Take frequent breaks as you mix so that you don't warm the ground beef and melt the fats.
When the meatloaf mixture is completely mixed together, shape it into a ball, then gently slap it back and forth between your hands to soften and melt the fats on the exterior of the meat mixture. This will help stop any cracking during baking.
Place the ball into the baking pan and gently shape it into a loaf. If you see some cracking on top, smooth it out with your hands.
The Sauce:
Mix together the soup and tomato sauce, then pour half of the mixture onto the top of the meatloaf and spread if over the entire loaf.
Bake at 350F for 1 hour. Remove from the oven and top with the remaining tomato sauce mixture, spreading over the entire top of the meatloaf.
Bake at 350F for 45 minutes, then cool for 15 minutes before slicing.