Cook the Bacon
Heat olive oil in a large pot over medium heat. Add the chopped bacon and cook for about 4-5 minutes, until crispy and browned. Remove the bacon and set aside, leaving a little bit of the rendered bacon fat in the pot.
Sauté the Vegetables
In the same pot, add the diced onion, celery, and carrots. Cook for about 5-7 minutes, or until the vegetables are softened. Add the minced garlic and cook for another minute, until fragrant.
Add the Broth and Tomatoes
Stir in the diced tomatoes, clam juice, and water. Add the bay leaves, dried thyme, and season with salt and pepper. Bring the soup to a simmer, then reduce the heat and let it cook for 20-25 minutes, until the vegetables are tender and the flavors have melded together.
Add the Clams and Bacon
Stir in the chopped clams and cooked bacon. Let the soup simmer for an additional 5 minutes to heat the clams through and allow the flavors to combine.
Finish and Serve
Remove the bay leaves from the soup. Taste and adjust the seasoning with more salt, pepper, or a squeeze of lemon juice for added brightness. Stir in fresh parsley just before serving.
Ladle the chowder into bowls and serve with crusty bread or crackers on the side.