Roasted Shrimp & Tomatoes With Roasted Garlic Parmesan

Ingredients

• 1 head cauliflower
• 4 Tbsp. olive oil, divided
• 1 jar (16 ounces) RAGÚ® Roasted Garlic Parmesan Sauce
• 3/4 cup uncooked polenta (cornmeal), divided
• 1 ¾ cups water (plus more if needed)
• 2 Tbsp. butter divided
• 1 lb shrimp, extra-large, peeled, deveined
• 10 ounces cherry tomatoes
• 3 garlic cloves, minced
• 2 cups baby arugula, packed
• 2 Tbsp. pine nuts, toasted