Step 1

Preheat the oven to 350 degrees F.

Step 2

Grease a 9x13-inch baking dish.

Step 3

In a large pot of salted boiling water, cook the pasta to al dente according to the package instructions.

Step 4

In a large bowl, mix the Italian cheese blend, 1 cup of the parmesan cheese, the sour cream, and the salad dressing together.

Step 5

Drain the pasta and add it to the cheese mixture.

Step 6

Fold the spinach into the pasta mixture and transfer it to the prepared baking dish.

Step 7

Place the bread pieces in a food processor, cover, and pulse until crumbs form.

Step 8

Toss the breadcrumbs with the oil, the lemon zest, the parsley, the garlic salt, and the remaining parmesan cheese.

Step 9

Sprinkle the breadcrumbs over the pasta mixture and bake, covered, about 25 minutes.

Step 10

Uncover the dish and bake the pasta mixture until it is golden-brown and bubbly, about 5-10 minutes.

Step 11

Serve.