Heat the Oil: Place a large skillet over medium-high heat and add the olive oil, letting it warm for about 1 minute until shimmering.
Cook the Cauliflower: Add the frozen cauliflower rice directly to the skillet (no thawing needed) and cook for 5-7 minutes, stirring occasionally, until the rice is tender and any excess moisture has evaporated.
Add Aromatics: If using minced garlic, add it during the last 1-2 minutes of cooking and stir constantly so it doesn't burn.
Finish with Flavor: Remove from heat and immediately stir in the fresh cilantro and lime juice, then season with salt and pepper to taste.