Garden Churkey Burger

Ingredients

• 1 lb ground turkey
• 1 lb ground chicken
• 4 tbsp pesto ((heaping tablespoons))
• 1 red onion
• 4 tbsp olive oil ((divided))
• ¼ tsp crushed red pepper ((more to taste))
• 1 tsp salt
• 1 tsp pepper
• oil ((for cooking burgers))
• 2 large tomatoes
• 1 avocado ((thinly sliced))
• 2 cups arugula ((or spring mix or romaine leaves))
• mayonnaise ((optional))
• slices of cheese ((optional))
• hamburger buns or rolls