01 -
Cook spaghetti until al dente. Drain well.
02 -
Heat skillet to medium. Butter one side of each slice.
03 -
Place bread buttered-side down. Layer with spaghetti. Add marinara sauce. Top with mozzarella. Cover with buttered bread.
04 -
Grill 3-4 minutes per side. Until golden brown. Cheese should melt.
05 -
Cool briefly. Slice and serve hot.