
MAKING WHITE WINE PARMESAN SAUCE: Add butter, yellow onion and minced garlic to pan. Cook on medium high until onions and garlic are translucent, about 2 minutes.
Add chopped scallions and diced tomatoes. Add 1 tablespoon flour to pan and whisk to combine. Add heavy cream, wine, Italian Seasoning, salt and red pepper.
Bring mixture to a simmering point and then add ½ cup of shredded Parmesan cheese. Use a whisk or a wooden spoon and mix it in until you have a smooth mixture. Remove from heat and set aside.
COOKING PASTA: Cook 12 oz of spaghetti Al Dente, when it's neither too hard nor too soft (we will be reheating it in the sauce where it will have a chance to cook further, soften up and absorb all that great flavor). Drain, but do not rinse
ADDING PASTA INTO SAUCE: Add freshly cooked hot pasta to the skillet with the sauce and stir to combine on low heat for 2-3 minutes. Taste and add salt, if needed. Serve with shredded Parmesan on top.