Step 1: Bring a pot of water to a boil. Add pasta and cook until al dente, for about 8 minutes.
Step 2: Meanwhile, in a large saute pan over medium heat, then put oil.
Step 3: Add sausages and saute until browned. Add garlic and kangkong. Saute until garlic is softened and green are wilted.
Step 4: Drain pasta, and keep 1/2 cup of pasta liquid, and add to sausage mixture.
Step 5: Top with cheese, and toss to combine. Pour in the reserved pasta water and stir until cheese melts.
Step 6: Add red pepper(this is optional), salt and pepper to taste. Then again saute for several seconds until-heated through.
Step 7: Serve hot. Makes 4 servings.