Prep the produce. Dice the onion, slice the bell pepper and carrots, mince the garlic, and grate the ginger.
Slice the green onions for garnish. If using fresh cauliflower, pulse florets in a food processor until rice-sized.
Brown the beef. Heat a large skillet over medium-high. Add 1 teaspoon oil, then the ground beef.
Season with salt and pepper. Cook, breaking it up with a spatula, until browned and no longer pink, about 5–7 minutes. Drain excess fat if needed.
Build flavor. Push the beef to one side.
Add a touch more oil, then the onion, carrots, and bell pepper. Cook 3–4 minutes until slightly tender. Stir in the garlic and ginger and cook 30–60 seconds until fragrant.
Add the sauce. Stir in soy or tamari, rice vinegar, and a small splash of water if the pan looks dry.
Add chili flakes or sriracha if you like heat. Simmer 1–2 minutes so the beef absorbs the flavors.
Cook the cauliflower rice. In a separate large skillet, heat 1 teaspoon oil over medium. Add the cauliflower rice with a pinch of salt and pepper.
Sauté 5–7 minutes until tender but not mushy. Stir in the sesame oil at the end for aroma.
Assemble the bowls. Spoon cauliflower rice into bowls. Top with the beef and veggie mixture.
Finish with green onions and sesame seeds. Taste and adjust seasoning with a splash more soy or a squeeze of lime if you have it.
Make it yours. Add extras like shredded cabbage, sliced cucumbers, a fried egg, or a drizzle of spicy mayo if you want more richness.