Tomato Soup With Roasted Garlic And Herbs

Name: Tomato Soup With Roasted Garlic And Herbs
Ingredients: 1 tablespoon olive oil; 1 large onion, diced; 2 ribs celery, diced; 1 can (28-ounce) Muir Glen Fire-Roasted diced tomatoes; 1 can (28-ounce) Muir Glen Fire-Roasted crushed tomatoes; 3 cups vegetable or chicken broth; 2 teaspoons dried oregano; 2 teaspoons dried basil; 1/4 teaspoon cayenne (or to taste); 8 cloves roasted garlic (instructions here); 2 tablespoons minced parsley; Salt and pepper to taste; 1 or 2 tablespoons sugar (optional); 4 tablespoons plain yogurt (optional); Croutons (optional)