Chipotle Black Bean Burgers

Name: Chipotle Black Bean Burgers
Ingredients: 2 15-ounce cans seasoned black beans; 1 c. seasoned breadcrumbs; 1 small zucchini, coarsely grated (about 1 cup); 1 medium carrot, coarsely grated (about 1/2 cup); 1/4 white onion, coarsely grated (about 1/4 cup); 1 large egg; 2 tbsp. chopped canned chipotle chiles in adobo sauce; 1 tsp. kosher salt, plus more to taste; Black pepper, to taste; 2 ripe avocados; Juice of 1 lime; 3 tbsp. vegetable oil; 6 slices muenster cheese; 6 onion rolls, split and toasted; Sliced tomato and pickled jalapeños, for topping