Vegan Cheeseless Quesadillas

Name: Vegan Cheeseless Quesadillas
Prep time: 20 min
Cook time: 10 min
Total time: 30 min
Cuisine: American, Latin American, Mexican
Ingredients: ¾ cup onion (, chopped (about ½ a medium onion)); ¾ cup bell pepper (, chopped (about ½ a medium pepper)); 1 cup button mushrooms (, chopped (about 6 medium mushrooms)); 2 cloves garlic (, minced); 2 tablespoons avocado oil ((or oil of your choice)); ½ cup corn kernels ((I use frozen corn)); ½ cup cilantro (, chopped); 1 tablespoon taco seasoning; 1 ½ cups refried beans ((14 oz/ 400 mL can)); 2 medium avocado; 4 large flour tortillas; salsa; vegan sour cream