Step 1

Set aside 4 tongues of sea urchin to use as garnish. Combine remaining sea urchin and crema using a blender, immersion blender, food processor, or mini chopper. Blend until completely smooth. Set aside.

Step 2

Place pasta in a 12-inch skillet or a saucepan and cover with water. Season with salt. Set over high heat and bring to a boil, stirring occasionally. Cook until pasta is just shy of al dente and retains a small chalky core.

Step 3

Meanwhile, heat olive oil in a large skillet over medium heat until shimmering. Add garlic and shallot and cook, stirring constantly, until softened but not browned (lower heat if the aromatics threaten to brown), about 2 minutes. Add Calabrian chili spread and stir until homogeneous. Add sake or wine and cook until liquid is reduced down to less than 2 tablespoons, about 1 minute. Remove pan from heat and set aside until pasta is cooked.

Step 4

When pasta is cooked, use tongs to transfer the noodles directly from the boiling water to the pan with the garlic/oil mixture. Scrape uni purée into pan and add a few ounces of starchy pasta-cooking water. Set pan over high heat and cook, stirring and swirling constantly, until the sauce comes together and develops a creamy consistency and the pasta is fully cooked, about 1 minute. Add more pasta water as necessary to thin the sauce if it over-thickens. Season to taste with salt and black pepper.

Step 5

Divide pasta between warmed serving bowls, drizzle each portion with more extra-virgin olive oil, garnish each with a whole sea urchin tongue, sprinkle with minced chives, and serve.