Cheesy Chili Pepper Pinto Sliders with Caramelized Onions

Name: Cheesy Chili Pepper Pinto Sliders with Caramelized Onions
Ingredients: 1-2 tablespoons canola oil; 3/4 cup finely chopped onion; 2 garlic cloves, finely minced; 1 teaspoon cumin; 1 teaspoon chili powder; 6 ounces portobello mushrooms, finely chopped; 1 medium jalapeno, finely chopped; 2 small sweet red chili peppers, finely chopped; 15 ounces can of pinto beans; 2 tablespoons parsley, finely chopped; salt + pepper, to taste; 2 tablespoons rice flour; all-purpose flour to lightly coat the patties; 4 hamburger buns or another roll of similar size; 4 slices of cheese (I used a colby/pepperjack blend); sliced onions, caramelized