Italian Sausage Rigatoni in Creamy Sauce

Bring a large pot of salted water to a boil. Wash and dry all produce. Cut pepper in strips. Chop scallions separating whites from greens. Dice tomato. Zest and quarter lemon. Heat a drizzle of oil in large saucepan. Add bell pepper and scallion whites. Season with salt and pepper. Cook 3-4 minutes. Add sausage to pan, breaking up into small pieces. Cook 4-6 minutes. Season with salt and pepper and a pinch of red pepper flakes. Drain grease. Cook pasta for 9-11 minutes. Add tomato to pan. Cook 1-2 minutes. Stir in cream cheese, sour cream and half the parmesan cheese. Add 1/4 cup of water from cooking pasta. Add 1 tablespoon butter. Season with salt and pepper and lemon zest. Mix in cooked rigatoni. Toss to coat. Serve pasta. Top with remaining parmesan cheese, a pinch of red pepper flakes, green scallions. and lemon wedge.