Sous Vide Beef Tenderloin Roast

Ingredients

• 4 ½ pounds of whole beef tenderloin
• 1 tablespoon of sea salt or kosher salt (e.g. (, Redmonds®))
• 1 teaspoon of freshly ground black pepper (, or adjust to taste)
• 6 cloves of garlic
• a few sprigs of fresh thyme (, or adjust to taste)
• a sprig of rosemary
• 3 tablespoons of unsalted butter (, divided, or more if needed)
• 2 tablespoons of olive oil (, or as needed)
• a splash of red wine
• 1 tablespoon of gelatin powder
• 1 cup of cold water
• salt and freshly ground black pepper (, adjust to taste)