Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to make scalloped potatoes and ham [title] Preheat the oven to 350 ° f (177 ° c) and grease a 2-quart (2 liters) casserole dish with cooking spray. [title] Melt the butter in a large saucepan over medium heat, then add the onion and cook for 2 minutes. [step] Stir the onion occasionally to help it cook evenly.

Ending1: You don't want to boil the onion, as the butter will melt and cook unevenly. [title] Add the bacon and cook them for 1-2 minutes longer, stirring occasionally. Ending2: You'll get 40% cooking time if you slow it down! [title] Chop the onions and ham together and set aside. [step] Cut the cream cheese and lemon zest into quarters lengthwise and set aside. Ending3: [title] Add the remaining 1 cup (100 g) of boneless scallop. [step] Stir it constantly as it cooks, remembering that it's about 10 mins. Ending4: You will be ready for the next step when the onion turns tender. [title] Whisk in the flour, salt, and pepper and cook until it turns smooth and bubbly.

Answer format: ending1/ending2/ending3/ending4