Pasta with cauliflower

This recipe sounds quite tasty. The ingredients:

• 1 onion, chopped (about 1 1/2 cups)
• 2 Tbsp anchovies packed in oil, minced (about 6 anchovies)
• Olive oil
• 1 cup fresh breadcrumbs*
• 1 large head of cauliflower, core removed and discarded, florets coarsely chopped
• 5 cloves of garlic, minced
• 1/2 teaspoon of crushed red pepper flakes (more or less to taste)
• Salt and freshly ground black pepper
• 3 Tbsp tomato paste
• 1/2 pound small elbow macaroni
• 1 15-ounce can of whole tomatoes, chopped, or diced tomatoes, including juice
• 1/4 cup chopped Italian parsley
• 1/2 cup freshly grated Parmesan cheese