Vegan Mushroom & Black Bean Burgers

Name: Vegan Mushroom & Black Bean Burgers
Prep time: 1 h 30 min
Cook time: 15 min
Total time: 1 h 45 min
Cuisine: American
Ingredients: 1 cup cooked brown rice; 1 1/3 cups canned black beans, mashed; 1 tbsp olive oil (plus extra for frying); 6-8 -medium mushrooms (cremini/white button), finely chopped; 1 stalk celery , finely chopped; 1 small carrot, finely chopped; 1/4 red onion, finely chopped; 2 cloves garlic, finely minced; 1/2 teaspoon salt; 1 1/2-2 cups bread crumbs; 1 tbsp ground chia seeds; 2 tablespoons nutritional yeast; 2 1/2 tablespoons soy sauce; squeeze lemon juice; buns; vegan cheese slices; tomato, sliced; red onion, sliced; dill pickles, sliced; green leaf lettuce; condiments: vegan mayo, ketchup, mustard