Add 2 tbsp olive oil to a large saucepan and place it over medium-high heat. Add the meat and cook for 5-7 minutes until browned. Transfer the beef to a plate.
Step 2
Dice the onion and bell peppers, and mince the garlic. Add the remaining oil to the pan, then add the vegetables and cook them for 5-7 minutes until they soften. Stir continuously to prevent the garlic and onion from burning.
Step 3
Add the cauliflower rice, marinara sauce, chili flakes, salt, and pepper. Return the cooked beef to the pan, and stir to combine. Reduce the heat to low.
Step 4
Bring the mixture to a simmer, then cover the skillet with a lid. Cook for 10 minutes until the cauliflower is tender. Take it off the heat.
Step 5
Taste and adjust seasoning if needed. Chop the parsley and sprinkle it on top. Serve warm.