Light Texas Corn Bread

INGREDIENTS

• 1 1/2 cups self-rising yellow cornmeal mix
• 2 tablespoons sugar
• 5 tablespoons light butter, melted and divided
• 1 cup chopped onion
• 1 cup chopped green bell pepper
• 1 cup fat-free sour cream
• 1 cup no-salt-added cream-style corn
• 1/2 cup (2 ounces) shredded reduced-fat extra-sharp cheddar cheese
• 1 large egg
• 2 large egg whites
• Cooking spray