Preheat oven to 350 degrees
Heat a large sautée pan with the Olive Oil over medium heat.
Add in onions and cook until softened.
Add ground beef and brown the ground beef along with onions until fully cooked through. Season ground beef with salt and pepper to taste.
Add in cumin and stir.
Drain ground beef and onion mixture.
Put ground beef and onion mixture back in the same pan and add in half of the salsa verde jar. Mix well.
Spray a square or rectangle glass baking dish (size dependent on how many you are making.) You can use any oven safe dish you wish.
Spoon mixture into each tortilla, fold closed and place into baking dish, making dish fairly tightly compact but not squished.
Drizzle remainder of salsa verde jar on top of all enchiladas.
Top enchiladas with mozzarella
Bake at 350 degrees until cheese has melted, roughly 10 minutes
Change oven to High Broil, and broil for the final few minutes to slightly char the cheese in order to add a great depth of flavor.
Optional: Top with fresh cilantro and serve!