Five-Ingredient Veggie Burger

Ingredients (for 4 servings)

• 2 cup — black beans
• 1 whole — Onions
• ½ cup — oats
• 1 tbsp — lime juice
• 2 tsp — chili powder
• 1 whole — salt and black pepper
• 1 whole — avocado oil cooking spray
• 4 whole — hamburger buns
• 4 whole — leaf lettuce
• 1 whole — tomato
• 2 whole — Onions
• 1 whole — condiments