Slice the poblanos in half and lay on a greased baking sheet. Drizzle with olive oil and sprinkle salt and pepper. Bake for 10 minutes and set aside.
While the peppers are baking, crumble the sausage into a large pan over medium heat and cook through, about 10 minutes. Add the jalapeno and continue cooking for 3-4 minutes until soft.
Add rice, corn, black beans, and diced tomatoes into the same pan. Stir and continue cooking until warm, about 5 minutes.
Spoon out the mixture into the baked poblano halves. Top with cheese and bake for 15 minutes. Garnish with cilantro and serve.