Heat up 2 tbsp of the oil in a saucepan and whisk the flour with it. As soon as you see bubbles, lower the flame/temperature. Keep consistently stirring the flour for 3 minutes to allow the flour to bake. Turn off the stove and pour the plant milk in while whisking the mixture. Once you've mixed in the last bit of plant milk, add the wine, salt, and pepper. Slowly heat the mixture back up to let the sauce thicken.