Step 1: Rice the cauliflower: If using a whole head, remove the leaves and stem, then cut it into florets. Use a food processor to pulse the florets until they resemble rice. Alternatively, you can buy pre-riced cauliflower from the store.
Step 2: Heat the olive oil in a large skillet over medium heat.
Step 3: Add the riced cauliflower to the skillet, followed by garlic powder, onion powder, salt, and pepper. Stir well to combine.
Step 4: Sauté for 5-7 minutes, stirring occasionally, until the cauliflower is tender but not mushy.
Step 5: Divide the cooked cauliflower rice among serving bowls.
Step 6: Top each bowl with black beans, corn, diced red bell pepper, avocado slices, and cherry tomatoes.
Step 7: Garnish with fresh cilantro and serve with lime wedges on the side for squeezing over the top.