Chicken and Summer Vegetable Tostadas

Bahan-bahan (4 porsi)

• 12 ounces chicken breast
• 1 teaspoon ground cumin
• ¼ teaspoon salt
• ¼ teaspoon pepper
• 2 teaspoons canola oil
• 1 cup chopped red onion
• 1 cup fresh corn kernels
• 1 cup chopped zucchini
• ½ cup salsa
• 3 tablespoons chopped fresh cilantro, (divided)
• Four 8-inch low carb flour tortillas
• cooking spray
• 1 cup shredded pepper jack cheese
• 4 tablespoons light sour cream
• additional chopped tomato, (to garnish (optional))