Simply cut up the stale bread into cubes about 1/2" square, and spread them out in a single layer on cookie sheets. (Use the kind with sides, sometimes called 'jelly roll pans. ') You can either toast them in the oven as-is, or season them to taste.
Can you use stale bread for toast?
But it also turns out that slightly stale bread is actually the best for making French toast because stale bread absorbs more of the egg mixture than fresh bread will. If the only bread you have just popped out of the oven, you could try toasting it very slightly first.
Is stale bread safe to eat?
As long as there's no mold, stale bread can still be eaten — but it may not taste as good as fresh bread.