Preheat the oven to 200 degrees Celsius (approximately 392 degrees Fahrenheit).

Place the prepared french fries on a baking pan.

Bake the french fries until crispy. Remove from oven.

Dice the bacon into small pieces.

Fry the diced bacon in a pan until golden brown.

Remove half of the fried bacon from the pan and set aside.

Drain the excess grease from the pan, leaving a small amount for flavor.

Mince the onion and garlic.

Add the minced onion and garlic to the pan with the bacon grease.

Cook the onion and garlic until the onion becomes transparent.

Pour the dark beer (or beef bouillon) into the pan.

Bring the mixture to a simmer and cook for approximately 2 minutes.

In a small bowl, dissolve the cornstarch in the water, creating a slurry.

Pour the cornstarch slurry into the simmering beer mixture.

Stir continuously until the gravy thickens, approximately 2 minutes.

Season the gravy with salt and pepper to taste.

Grate the cheddar cheese.

Evenly sprinkle the grated cheddar cheese over the baked french fries.

Pour the prepared gravy over the cheese-covered french fries.

Top with the reserved crispy bacon pieces.

Serve immediately.