Place the sugar, water, lavender flowers, finely pared lemon peel and black peppercorns in a non-corrosive saucepan. Bring up to the boil, stirring occasionally, until the sugar has dissolved ...
Mix together the vinegar and oil. In a pestle and mortar, grind the lavender, salt and sugar. Mix into the oil and vinegar. Peel and dice the avocados. Mix together with the strawberries and dressing.