Southwest Black Bean Burgers with Burger Sauce

Name: Southwest Black Bean Burgers with Burger Sauce
Prep time: 20 min
Cook time: 10 min
Total time: 30 min
Cuisine: American
Ingredients: 4 burger buns (or gluten-free burger buns); 2 15 oz cans black beans (rinsed, drained, and patted dry); 1/3 cup chunky salsa ((mild or spicy)); 3/4 cup Panko bread crumbs (or gluten-free bread crumbs); 1/2 cup corn; 1 flax egg ((1 tbsp ground flax + 2 tbsp water)); 1 clove garlic (minced); 2 tsp chili powder; 1 tsp cumin; 1 tsp smoked paprika; 1/2 tsp oregano; 3/4 tsp salt; Pinch pepper; 1 tbsp olive oil; 1/4 cup non-dairy yogurt (unsweetened (such as almond or soy)); 1 tbsp vegan mayo; 1 tsp maple syrup; 1/2 tsp garlic powder; 1/2 tsp chili powder; pinch salt; romaine; tomato (sliced); red onion (sliced); avocado (sliced)