Warm coconut oil in a large, nonstick soup pot, over medium high heat.
Add sliced chicken sausage and cook, stirring often, until warmed through (about 6 minutes). Remove sausage to a bowl (keep warm) until later.
Add red onion and salt to the pot; cook, stirring often, until onion is softened.
Stir in garlic and red pepper flakes; cook for 1 minute.
Add broth, bring to a boil over high heat.
Add pasta to the broth and cook, stirring frequently, for 8 minutes.
Add the chopped broccoli and cook and additional 4 minutes, stirring occasionally.
Stir in cooked sausage, 3 Tablespoons of grated Parmesan cheese and lemon juice.
Garnish with halved grape tomatoes and remaining Parmesan cheese.
Yields 6 1 1/2 half cup servings.