Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to make cheese toast [title] Butter a slice of white bread on both sides. [step] Try sourdough for a tangy flavor, or an airy bread like ciabatta if you like the cheese oozing through the holes and burning on the pan. Buttering both sides will create a golden crust and a moist interior.

Ending1: [substeps] Alternatively, squeeze some wet butter into a saucepan and add lemon juice, olive oil or worcestershire sauce. Heat on medium heat until both sides are slightly bubbly, about 15 to 20 seconds. Ending2: [title] Pour red pepper flakes into a small saucepan or pot. [step] Place them over medium heat and stir occasionally, so they don't burn. Ending3: [substeps] If you use unsalted butter, add a pinch of salt to the pan to add more flavor. [title] Fry the bread on both sides (optional). Ending4: [substeps] Brown the bread on both sides before cutting it down the middle and rolling it all the way out. [title] Spread a layer of margarine over the toast.

Answer format: ending1/ending2/ending3/ending4