1. Simply cut the buns in half/open and spread with ketchup, sprinkling the 3 grated cheeses on top (at this point you can sprinkle on a little mixed herb or a dab of sour cream and chive sauce if you like).
Step 2:
Step 3:
2. Place in a pre-heated grill at a medium temp. till the cheese is melted and bubbling
Step 4:
Step 5:
3. Sprinkle a little salt to taste and get munching!