Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to cook a brisket [title] Saute the sliced onions. [step] Place a skillet on the stove and pour in 1 tablespoon (15 ml) of olive oil. Turn the heat to medium and thinly slice 1 1/2 pounds (680 g) of yellow or red onions (about 2 large onions).

Ending1: Cook the onion in the oil and drain the liquid. [substeps] Refrigerate the onion throughout the cooking process. Ending2: Sprinkle the onions with salt and pepper and cook for a minute or two. [substeps] Peel the onions and finely chop them with a paring knife. Ending3: When the skillet is hot, add the onions. Stir the onions occasionally and cook them for about 20 minutes. Ending4: Lower the heat to medium and allow the onions to cook for about 5 minutes. [substeps] Stir the onions regularly as they cook so they don't burn.

Answer format: ending1/ending2/ending3/ending4