Cheesy pasta with spinach and tomatoes

Pasta and macaroni Italian cuisine

1/2 pound Chiocciole pasta 4 tablespoons Extra virgin olive oil 1/2 Red onion 2 cups Sugar plum tomatoes or baby orange 1 tablespoon Crushed red pepper flakes (or to taste) 4 cups Fresh baby spinach 3/4 cup Blue cheese (block, high-quality) 1 cup Parmesan cheese 1 teaspoon Dried parsley flakes to taste, Black pepper