Heat oven safe skillet over medium high heat. Add oil, onion, and bell pepper. Cook for about 5 minutes.
Add in ground beef and cauliflower, cook about 5-7 minutes until ground beef is browned.
Stir in garlic, chili powder, cumin, oregano, salt and chipotle, cook for 1-2 minutes. Add tomatoes, bring to a simmer until cauliflower is tender, about 3 minutes.
Sprinkle with cheese and top with jalapeños. Put in over on broiler mode high for 2-3 minutes until cheese is melted. Enjoy!