Cook cauliflower rice package in microwave, according to directions. Remove, and set aside.
Heat olive oil in a skillet over medium heat; cook and stir garlic in the hot oil until fragrant and beginning to brown, about 2 minutes. Stir in cauliflower rice; cook until rice is hot, stirring often, 2 more minutes. Add spinach and cook until heated through, 3 more minutes.
Stir artichoke hearts and roasted red peppers into rice mixture and cook 2 minutes; mix in feta cheese, remove from heat, and serve immediately.