Cook pasta save pasta water.
In a large saute pan heat oil. Pull off heat and add a pinch of red pepper flakes and garlic. Garlic will brown quickly add lemon zest and juice. Add 1/2 c pasta water. Add pasta to pan and stir to combine. Heat through. Salt and pepper to taste, add romano 1/4 cup at a time. Add parsley. If to dry add 1/4 more pasta water. Check for seasoning. Serve with additional romano cheese.
You can add Grilled chicken, cooked broccoli, grilled vegetables, sausage.