Slow Cooked Italian Beef and Pesto Stew

1/2 cup flour

1 1/2 teaspoon salt

3/4 teaspoon pepper

1 pound beef stew meat

1/4 cup olive oil

2 cups sliced carrot

1 cup diced celery

1 1/2 cups finely chopped white onion

4 cloves garlic

32 ounces beef broth

1 14.5 ounce can petite diced tomatoes

3 tablespoons prepared pesto

1/2 teaspoon dried oregano

1/2 cup parmesan cheese

Elbow noodles optional