3 pasta with spicy cauliflower and Recipes

olive oil, whole tomatoes, yellow onion, halved and thinly sliced (about 3 medium), kosher salt, garlic cloves, minced, heavy cream, chopped fresh flat leaf parsley, crushed red pepper flakes, rigatoni pasta, cauliflower florets, shredded fontina cheese (about 2 1/2 cups), freshly grated parmigiano-reggiano cheese (about 3/4 cup)

cauliflower florets , cut into 1-inch pieces (about 10 oz), whole wheat penne, olive oil, crushed red pepper flakes (or more to taste), italian parsley, chopped, garlic cloves, minced (2 1/2 tsp), walnuts, coarsely chopped, kosher salt, black pepper, freshly cracked, parmigiano-reggiano cheese, freshly grated for garnish