1 pound sirloin steak, thinly sliced
1 tablespoon olive oil
1 bell pepper (any color), sliced
1 onion, sliced
1 packet fajita seasoning (low sodium)
1 cup cauliflower rice
1/2 avocado, diced
1/4 cup salsa
2 tablespoons sour cream (optional)
1/4 cup shredded cheddar cheese (optional)
lime wedges, for serving
salt and pepper to taste