Place egg poaching rings in frying pan and add water just to come half way up the side of the rings.
Break each egg into a small cup so they can be efficiently poured into the rings.
Bring water to a boil, reduce heat to gently simmer and add vinegar.
Gently pour the eggs into the poaching rings.
Cover and cook 90 seconds-2 minutes, depending how soft you like them.
Using a slotted spoon remove the egg and ring from the water. Rest it on a dry dishcloth to absorb some water then slide onto avocado toast.
Top with fresh cracked pepper and Parmesan cheese shavings.
Serve hot with sliced tomatoes and radishes.