Heat a saucepan or small pan on medium heat. Add the oil and butter and let them melt. Add the minced garlic and finely chopped fresh thyme. Cook for 30 seconds until fragrant.
Add the flour while stirring to create a roux. Cook for 1 minute while stirring continuously.
1 tbsp all-purpose flour
Pour in the vegetable stock while stirring to avoid any lumps. Bring it up to a simmer for 2-3 minutes. The sauce will thicken up during this time. Keep stirring.
1/2 cup vegetable stock
Add the heavy cream and season with salt and freshly ground pepper to taste. Serve immediately with grilled meat or your favorite pasta.
1/2 cup heavy cream, 1 tsp salt, 1/2 tsp ground black pepper
Notes
Storage tips: You can store this creamy sauce in an airtight container in a refrigerator for 3 days. Simply reheat it with some extra stock or cream if it's too thick. I don't recommend freezing it as the cream will separate when thawing.