Place a pan onto your stove on a low heat.
When the pan is warm, add ½ cup of butter and stir until melted.
Sieve in your wheat flour and combine with the butter. When fully combined, your mixture should have a paste consistency.
Add in one cup of milk and stir until mixture is smooth. Then add a second cup of milk and repeat the mixing process.
Add your mozzarella cheese slowly into the pan. Ensure that it is fully incorporated into your mixture before adding your parmesan cheese.
Add salt, pepper and oregano to the mixture to add a more authentic taste.
Stir for 5 minutes, until the mixture has thickened and ready to serve.