12 oz light sharp cheddar cheese (such as Cabot), sliced
Instructions
In a large nonstick skillet, heat olive oil over medium heat. Once hot, add the onions. Reduce heat to medium-low and saute onions 30-40 minutes, or until light golden brown, stirring every 5-10 minutes.
Lightly butter each piece of bread on one side; place 1 ounce of cheese followed by ⅙th of the onions and a second ounce of cheese between each pair of slices with the buttered sides facing out.
Grill sandwiches in the skillet or on a preheated electric griddle (350-375 F). Cook sandwiches 3-4 minutes or until just browned, flipping once. Serve hot.