Ballpark Pork Gyro with Peppers and Onions

Name: Ballpark Pork Gyro with Peppers and Onions
Ingredients: 1 pound New York (top loin) pork roast, boneless, thinly sliced; 1 tablespoon dried oregano or 2 tablespoons fresh oregano; 1 tablespoon dried rosemary or 2 tablespoons fresh rosemary; 1/2 teaspoon cumin; 1 teaspoon granulated garlic; 1/4 cup canola oil, divided; 1 red bell pepper, cored, seeded and thinly sliced (about 1 cup); 1 red onion, thinly sliced (about 1 cup); Salt and pepper, to taste; 2 tablespoons parsley, chopped; 5 gyro-style pita bread, warmed; 5 slices tomatoes, halved; 2 tablespoons fresh lemon juice; 5 tablespoons Greek yogurt, for garnish