Heat medium cast iron skillet or some other over-safe pan over high heat. When hot, add vegetable oil.
Add chorizo, white onion, green bell pepper, red bell pepper, cilantro, jalapeno and chili powder. Sauté until soft, approximately 2-3 minutes. Remove from heat.
Heat oven broiler to high heat.
Sprinkle cheese evenly over chorizo and vegetable mixture. Don’t attempt to stir it, it will get clumpy.
Place under broiler for 3-4 minutes or until cheese is melted, brown and bubbly.
Remove and top with the juice of one fresh lime, diced tomatoes, and additional cilantro, if desired. Serve with tortilla chips!