Heat oven to 160 degrees Celsius.
Cut the bread up in thick chunks.
Heat the oil in a sauté pan over a medium heat.
Add the butter.
Add the bread, reduce to a low heat and coat the chunks in the oil/butter.
Sprinkle on the thyme and fry gently for 3-4 minutes.
Transfer to a baking tray and bake until crisp throughout. I can't remember how long this took, probably around 15 minutes. You could just fry them of course, but I figured that baking them meant I didn't have to tend the frying pan for ages. You could even be all healthy and not fry at all, and just bake, but I've never tried that method.