Preheat your oven to 350°F (175°C).

In a mixing bowl, combine the crushed Ritz crackers and melted butter. Mix until well combined.

Press the mixture into the bottom of a 9-inch springform pan. Bake for 8-10 minutes until golden and fragrant. Remove from oven and let it cool.

In a skillet over medium heat, add the sliced andouille sausage and cook until browned, about 5 minutes.

Add the crawfish tail meat and chopped jalapeño; cook for an additional 3-4 minutes. Remove from heat and let cool slightly.

In a large mixing bowl, beat the softened cream cheese until smooth.

Add the sour cream, thyme, salt, and black pepper, mixing until combined.

Incorporate the eggs one at a time, mixing thoroughly after each addition. Fold in the cooled sausage and crawfish mixture.

Pour the filling over the prepared crust, smoothing the top with a spatula.

Bake for 45-50 minutes, or until the center just barely jiggles. Turn off the oven and crack the door, letting it cool for about an hour to prevent cracking.

In a saucepan over medium heat, heat the vegetable oil. Add the chopped shallots, cooking until translucent, about 3 minutes.

Add half of the crawfish, salt, white wine, vinegar, hot sauce, thyme, peppercorns, and garlic. Bring to a simmer, allowing it to reduce by half, about 5 minutes.

Strain the sauce, return to the saucepan, and add the heavy cream. Slowly whisk in the cubed butter until the sauce is thickened. Stir in the remaining crawfish.