Heat lightly oiled skillet over med-high; pat beef dry, add to pan in 1 layer + sear 2 min (for well done add 1 min); flip + cook 1 more min; season with salt/pep

Tear corner of cauliflower rice to vent + heat in microwave 90 sec (careful—it'll be hot!); if using a skillet, warm 2 min with 1 tbsp water

In batches, heat 2 tortillas in skillet over med-high, 30 sec or until warm; divide to plates

Divide veggies + meat to tortillas with 1-2 tbsp guacamole each, then roll up burrito style