Cut the crouton bread into thin slices. Cut off the crusts, cut into portions.
Grease slices of bread with olive oil and dry them in the oven or microwave (grill). Cool the finished croutons.
Cut the avocado, remove the peel and bone, mash in mashed potatoes. You can mash the avocado with a fork, purée it with a blender, or rub it through a sieve, depending on how smooth and smooth you want it to be.
Add olive oil, lemon juice (or apple cider vinegar), wine, salt, sugar. Stir the avocado pate until smooth.
Gently place the avocado pate on top of the bread slices. Cool the croutons with avocado pate before serving.