Ingredients for making meat loaf?

Here are the ingredients typically used to make meatloaf:

- 1 ½ pounds ground beef (you can also use a combination of ground beef, pork, and veal)
- 1 cup breadcrumbs (you can use regular breadcrumbs or panko)
- 1 small onion, finely chopped
- 2 cloves garlic, minced
- 2 eggs, beaten
- ½ cup milk
- 2 tablespoons Worcestershire sauce
- 2 tablespoons ketchup or tomato paste
- 1 teaspoon dried thyme
- 1 teaspoon dried oregano
- 1 teaspoon dried parsley
- 1 teaspoon salt
- ½ teaspoon black pepper

Optional ingredients for additional flavor variations:

- ½ cup grated Parmesan cheese
- ½ cup shredded cheddar cheese
- ½ cup diced bell peppers
- ½ cup diced mushrooms
- ½ cup diced carrots
- ½ cup diced celery
- ¼ cup chopped fresh herbs (such as parsley, basil, or cilantro)
- ¼ cup barbecue sauce

Note: These ingredients can be adjusted according to your taste preferences.