in medium sauce pan melt butter then add the red onion cook until tender and then add milk bring to boil then add cheese blend let the cheese melt then add 3 tbsp flour cook until thickened

and in another pan cook the spinach and broccoli and tomatoes for about 7-9 minutes or until done

meanwhile boil the pasta until done then drain pasta and pour in a large bowl and mix the sauce with pasta then add the vegetables then seasonings stir and its ready to serve