Boil potatoes until soft.
Melt milk and butter.
Mash the potatoes until just a few lumps remain. Add into the potatoes the milk and butter mixture, salt and pepper and stir.
Slowly add in both cheeses and continue to mix together.
In a small bowl add 2 tablespoons of breadcrumbs and a little Gruyére cheese and mix.
Pour potato mix into a baking pan and top with breadcrumb mix. Bake at 180 degrees for 40 minutes and until golden brown. This delicious melty potato side dish is absolutely delicious….:)