Prep and measure all ingredients before continuing with the recipe.
Heat oil in a 12-inch nonstick skillet over medium-high heat. Add onion and saute, stirring frequently, for about 4 minutes. Add zucchini, pepper, and garlic and saute 2 minutes longer. Transfer veggies to a dish. Add sausage to the now empty skillet and cook until starting to brown, turning occasionally, about 3 minutes.
Add veggies back to skillet and stir in riced cauliflower, tomatoes, chicken broth, and Italian seasoning. Salt and pepper to taste. Let simmer until cauliflower is softened, about 8-10 minutes.
Sprinkle with chopped fresh parsley and grated Parmesan. More fresh diced tomato is another great garnish addition. Serve warm and enjoy!