Steps
1. Heat the olive oil in a skillet over medium heat.
2. Add the sliced onion and bell pepper, sautéing until they begin to soften (about 3-4 minutes).
3. Stir in the minced garlic and cook for an additional minute until fragrant.
4. Add the mixed beans, chili powder, salt, and pepper; stir well to combine.
5. Cook for another 5-7 minutes, stirring occasionally, until everything is heated through and flavorful.
6. Remove from heat and garnish with fresh cilantro if desired. Serve hot.