Black Bean Burgers with Lemon-Yogurt Sauce

Ingredients

• 1 cup dry rolled oats (whole, not instant)
• 2 cans black beans (15.5 ounces), rinsed and drained well
• 1 medium zucchini, grated on the large holes of a box grater
• 1/2 teaspoon cumin
• 1/2 teaspoon coriander
• 1/2 teaspoon chili powder
• 1/2 teaspoon onion powder
• 1/4 teaspoon cayenne pepper
• 1/4 teaspoon turmeric (optional)
• 1 teaspoon kosher salt
• 1/4 teaspoon black pepper
• 1 egg (drizzle of olive oil can be substituted)
• olive oil for sauteeting
• 1/2 cup whole or 2% plain yogurt
• Zest of 1 lemon
• Juice of 1/2 lemon
• Kosher salt
• freshly ground black pepper