Tomato and Truffle Popcorn Soup Shooters

Ingredients

• 2 tablespoons unsalted butter
• 1 celery stalk, chopped
• 1 small carrot, chopped
• 1 large shallot, chopped
• 2 cloves garlic, chopped
• Kosher salt
• 1 1/2 tablespoons tomato paste
• 2 teaspoons all-purpose flour
• 1 15 -ounce can whole peeled tomatoes, crushed by hand
• 1 1/2 cups low-sodium chicken broth
• 1/4 cup heavy cream
• 2 tablespoons truffle oil
• 2 cups buttered popcorn
• 1 cup grated truffle pecorino cheese (about 3 ounces)