Southwestern Pumpkin Burgers

Name: Southwestern Pumpkin Burgers
Ingredients: 6 teaspoons extra-virgin olive oil, divided; 1 medium onion, chopped; ½ cup finely chopped red or green bell pepper; ½ cup fresh or frozen corn; 2 cloves garlic, minced; 2 teaspoons chili powder; 1 teaspoon ground cumin; Tomato Salsa, optional (recipe follows); ½ cup canned unseasoned pumpkin puree; 1/2 cup shredded Monterey Jack, or Cheddar cheese; ½ cup toasted wheat germ; ½ cup fine dry breadcrumbs; 2 tablespoons chopped fresh parsley; ½ teaspoon salt; Freshly ground pepper, to taste; 6 8-inch flour tortillas, (soft-taco size); 2 cups shredded lettuce