Add two steaks, half the butter, two cloves of garlic, and one sprig each of thyme and rosemary to a vacuum seal bag. Repeat with other steaks and the rest of the butter, garlic, and herbs.
Heat water to desired temperature.
Seal both bags, and drop in the water for 1 hour.
After an hour, remove steaks from bag. Pat dry with a paper towel.
Season steaks well with salt and fresh ground black pepper
Heat a cast iron skillet over medium heat. Add canola oil, garlic and herbs from one bag.
Sear steaks until golden brown, flip and repeat until crust is formed on the outsides. 2-3 minutes per side. Remove from pan.
Allow steaks to rest for 5 minutes before serving.