Pasta salad with mixed vegetables

Name: Pasta salad with mixed vegetables
Cuisine: European, Italian, Mediterranean
Ingredients: 12 ounces whole-wheat rotini (spiral-shaped) pasta; 1 tablespoon olive oil; 1/4 cup low-sodium chicken broth; 1 garlic clove, chopped; 2 medium onions, chopped; 1.5 cup diced tomatoes; 1 pound mushrooms, sliced; 1 red bell pepper, sliced; 1 green bell pepper, sliced; 2 medium zucchini, shredded; 1/2 teaspoon basil; 1/2 teaspoon oregano; 8 romaine lettuce leaves