Fry the kielbasa until golden brown. Deglaze pan with a little water, we are trying to get all that flavor off the bottom of the pan.
Add corn, beans, rice and taco season packet.
In a food processor place the pepper, onion and cilantro. Pulse until fine, add to the kielbasa mixture and toss to combine and heat through, about 10 minutes on medium to low heat. Add cheese to the top and turn flame to low. Cover and wait until cheese is melted. Serve immediately.
If made in advance you will need to heat casserole for a good 30 minutes until heated through and cheese is melted.