Sunny-Side-Up Egg Pita Pizzas

Ingredients

• 2 tsp canola or grapeseed oil
• 1 sweet onion (thinly sliced)
• 1 medium zucchini (thinly sliced (we used a mix of yellow and green))
• 4 whole-wheat pitas (6-in. diameter)
• 1 cup low-sodium refried beans
• 11/2 cups arugula ((reserve some for garnish))
• 1 cup low-fat mozzarella cheese (grated)
• 1 large tomato (finely chopped)
• 4 large eggs
• 1/4 tsp black pepper