Step 1: Prepare the Onions

1. Peel and Slice the Onions: Start by peeling your onions and slicing them into thick rounds. Thicker slices will hold up better during boiling and give a heartier texture.
2. Season the Onions: Lightly season the sliced onions with salt and pepper. This initial seasoning helps to draw out the onions’ natural juices and enhance their flavor.

Step 2: Sauté the Onions

1. Melt Butter in a Pot: In a large pot, melt the butter over medium heat. If you prefer, add a bit of olive oil along with the butter for a richer flavor.
2. Add the Onions: Place the sliced onions into the pot, arranging them so they cook evenly. Sauté for about 5 minutes, stirring occasionally until they begin to soften and turn golden.

Step 3: Add Seasonings and Boil

1. Add Seasonings: Add bay leaves, thyme, and minced garlic to the pot. Stir gently to distribute the seasonings evenly over the onions.
2. Add Water and Bring to a Boil: Pour in enough water to cover the onions, then increase the heat to bring the mixture to a gentle boil.

Step 4: Simmer and Serve

1. Simmer Until Tender: Once boiling, reduce the heat to low and allow the onions to simmer for 15–20 minutes, or until they’re soft and fragrant.
2. Adjust Seasoning and Serve: Taste the broth and add more salt or pepper if needed. For a finishing touch, add a splash of lemon juice or a sprinkle of fresh parsley before serving.