Paccheri Pasta with Cauliflower

I saw this, on t.v., and I HAD to try it! Here's the original: Paccheri Pasta.

Paccheri Pasta with Cauliflower
Ingredients
1 tablespoon salt
1 bag frozen cauliflower florets
2 tablespoons olive oil, plus 2 tablespoons olive oil, for drizzling
3 tablespoons pressed garlic
1 tablespoon sliced garlic
1 teaspoon red pepper flakes (I just used some on mine, and Hubby's.)
1 bunch fresh spinach (about 3 cups)
1 (28-ounce) can crushed tomatoes
1 tablespoon capers
pinch black pepper
1 pound paccheri pasta (I used enriched penne.)
1/2 cup grated parmesean

Directions
Microwave cauliflower for a few minutes, until it's defrosted. Heat 2 tablespoons of olive oil in a large saute pan, and saute the garlic and red pepper flakes (if using) for 1 minute. Remove the cauliflower, from microwave, and add it to the pan with the garlic-red pepper mixture. Saute briefly until starting to brown, about 3 to 4 minutes. Add in the spinach, cover and let wilt for 2 minutes. Stir in the tomatoes and capers and reduce the heat. Remove the cover and let simmer for 5 minutes.
Cook pasta, al dente. Remove the pasta from the water and add it to the pan with the sauce, adding a little pasta water, if needed. Stir gently to combine, transfer to a serving bowl and sprinkle with half of the cheese. Garnish with the remaining 2 tablespoons of olive oil. Serve immediately with remaining cheese on the side.