Bring a large pot of water to a boil and cook the macaroni noodles until al dente or as directed on the packaging. Drain once cooked.
225 grams Elbow Macaroni
Melt, in a large skillet on medium heat, the butter. Whisk in the flour until smooth. Let simmer for 30 seconds until lightly golden with a nutty aroma. This is called a "roux" and what will thicken the cheese sauce.
2 tablespoon Butter, 2 tablespoon All Purpose Flour
Slowly pour the milk into the roux, a little at a time while whisking, letting it return to a smooth consistency after each addition. ** IF you are making this recipe only for the Macaroni and Cheese, I recommend adding another ½ cup of milk at this point for a creamier result. **
1½ cup Milk
Bring the sauce back to a simmer and whisk in the grated cheese. Add the salt and dry oregano. Once the sauce is smooth, turn off the heat.
2 cups Mozzarella, 2 teaspoon Dry Oregano, 1 teaspoon Salt
Add the cooked macaroni into the cheese sauce. Stir until fully incorporated. Let the mac n cheese rest for 5-10 minutes to lightly thicken.
Assemble the Grilled Cheese
Use a griddle or large frying pan to cook the grilled cheeses. Butter the outside of the bread slices and place butter side down on the grill. Place a slice of cheese on each piece of bread and pile on the mac n cheese on half of them. Once the bread is golden, flip the slices over the ones with the macaroni to create the sandwiches.