Instant Pot Shrimp Fra Diavolo

Ingredients

• 2 tablespoons unsalted butter
• 1/4 cup onion (chopped)
• 5 cloves garlic (chopped)
• 1 teaspoon tomato paste
• 1/2 cup white wine
• 1 1/2 teaspoon red pepper flakes
• 3/4 cup heavy cream
• 8 ounces mascarpone
• 2 1/2 cups water
• 2 teaspoons kosher salt
• 1 pound linguine (broken in half)
• 2 pounds shrimp
• 1 cup parmesan (freshly grated)
• 4 cups arugula
• 1/2 cup basil leaves (chiffonade)