**Season the Chicken**
Season the chicken breasts with Cajun seasoning, salt, and pepper on both sides. Heat olive oil in a grill pan or skillet over medium-high heat. Cook the chicken for 5-6 minutes per side, or until the internal temperature reaches 165°F and the chicken is golden and cooked through. Remove from heat and let it rest for a few minutes before slicing into thin strips.
**Prepare the Cauliflower Rice**
If using a whole head of cauliflower, cut it into florets and pulse in a food processor until it resembles rice-sized pieces. Alternatively, use pre-made cauliflower rice. Heat olive oil in a large skillet or wok over medium heat. Add the cauliflower rice, garlic powder, salt, and pepper. Cook for 5-7 minutes, stirring occasionally, until the cauliflower rice is tender and lightly golden.
**Assemble the Bowls**
Divide the cooked cauliflower rice among 4 serving bowls. Top each with sliced Cajun chicken, diced mangoes, and sliced avocado. Garnish with freshly chopped cilantro and a squeeze of lime juice.
**Serve**
Serve the Cajun Chicken Cauliflower Rice Bowls immediately, or refrigerate for up to 2 days for meal prep.