Preheat oven to temperature for frozen french fries. Cook Fries according to package directions.
Season Ground beef with Salt and Black pepper. Form into a patty and cook in a skillet over medium heat until browned and cooked through.
While the patty is cooking, prepare the Cheese Sauce. Melt Butter in a saucepan over medium heat. Whisk in All-purpose flour and cook for 1-2 minutes to create a roux.
Gradually whisk in Milk until smooth. Bring to a simmer, stirring constantly. Reduce heat to low and stir in Cheddar cheese and Garlic powder until melted and smooth.
Toast Bread to desired level of doneness.
Place toasted Bread on a plate. Top with the cooked hamburger Patty, then French fries. Generously pour Cheese Sauce over the fries.