Creamy Vegetable Noodle Soup

Ingredients:

2 tablespoons olive oil See Notes for oil-free option.
1 yellow onion, diced
3 carrots, peeled and diced
2 ribs celery, diced
1 red bell pepper, seeded and diced
1 tablespoon dried parsley
1 teaspoon dried basil
1 teaspoon dried thyme
½ teaspoon dried dill
1 ¼ teaspoons salt, or to taste
¼ cup all-purpose flour (I used white whole-wheat for a whole-grain option) For a gluten-free option, use brown rice flour.
2 cups unsweetened and unflavored non-dairy milk, divided I used soy milk.
4 cups low-sodium vegetable broth
2 tablespoons nutritional yeast, optional
1 cup dry ditalini pasta or similar small pasta shape (gluten-free or whole-wheat, if desired)