– 1 tablespoon olive oil – ¼ cup diced onion – 1 jalapeno seeded and diced – 1 pound ground beef – 4 ounces cream cheese cubed – 2 tablespoons sugar-free taco seasoning – 10- ounces canned diced tomatoes with diced green chilis or jalapeños – ½ cup sour cream – ¾ cups sharp cheddar cheese