I can't believe I haven't made these before - a Kiwi classic recipe I found in Peter Gordon's Everyday (Harper Collins, 2012). Like an open version of spaghetti toasties or jaffles.
100g melted butter
12 slices sandwich bread, crusts removed
1 can spaghetti in tomato sauce
1 c grated cheese
Preheat oven to 180C. Butter a 12-muffin tin and place in the freezer for 1 minute to set the butter. Press the bread into each muffin pan and brush with the remaining butter - inside, tops and sides.
Spoon the spaghetti in and top with cheese.
Bake until the bread is crisp and golden, around 20 minutes. Leave in the tin for a few minutes before removing. Delicious hot or cold so perfect for picnics.