Tomato Parmesan Shrimp Pasta

Ingredients

• 11 ounces bucatini
• 1 tbsp olive oil
• 2 tbsp unsalted butter
• 1 pound shrimp (peeled and deveined)
• 1 tsp salt (divided)
• 1 tsp black pepper (divided)
• 9 ounces cherry tomatoes
• 4 garlic cloves (minced)
• 1 yellow onion (diced)
• 1 tsp dried basil
• 2 tbsp double concentrated tomato paste
• 1 ½ cups puréed tomatoes
• 1 cup heavy cream
• ½ cup grated Parmesan
• 3 1/2 ounces arugula
• chili flakes for serving