Pulse Cauliflower: To a food processor, add cauliflower florets and pulse until riced. (Depending on the size of your food processor, you may need to divide the florets into 2 batches.) Set aside.
Saute Onion And Jalapeño: In a large pan over medium heat, add oil. Once hot, add in onion and, optionally, jalapeño and cook until softened, about 3 minutes.
Add Minced Garlic: Add in minced garlic and stir until fragrant, about 30-60 seconds.
Cook Cauliflower Rice: Increase stovetop heat to high, add in cauliflower rice, half of the cilantro, chicken broth, salt, and pepper, and stir until combined. Cook on high heat for 1 minute.
Final Steps And Serve: Remove pan from heat, then stir in remaining cilantro, lime zest, and lime juice.