Cut the bread loaf into large slices
Cut the bread loaf into large pieces and allow it to dry for some time. There should be no moisture in it whatsoever, so keep it in a dry place.
Mix vinegar, mustard, salt, and pepper
Take a small bowl and add vinegar, mustard, salt, and pepper to it. Continue whisking this mixture and add a small amount of oil to it as well.
Slice the tomatoes into large chunks
Using a sharp knife, slice the tomatoes into large chunks. Add some seasoning to it and combine with bread.
Add celery, parsley, vinaigrette and more pepper to the mixture
Add the other ingredients to the mixture in order to enhance the taste. They are optional and depend on your taste. Toss all the ingredients continuously and allow them to settle in for a few minutes.
Preheat the oven to 400 degrees Fahrenheit
While the bread salad takes time to settle in, preheat the oven at 400 degrees Fahrenheit in order to prepare the roasted onions.
Peel the onions and slice them
Remove the onion skin and slice it in large pieces. It will be ideal to choose four medium sized onions, as they will fit properly on one baking sheet.
Add seasoning to the onion slices
After putting the onion slices; sprinkle some salt and pepper on it. You can also add some olive oil and balsamic vinegar as per your taste.
Bake the onions in the oven
Place the baking sheet into the oven for 30 minutes. Once they are fully roasted, you will get a golden brown texture.
Serve the bread salad with roasted onions
Both things are ready to be served now. You can enjoy them with tomato ketchup or any other sauce of your own choice.