Stir the eggs, half the milk, oil, olives, parsley, tarragon and thyme together, then add the dry ingredients, prepared in Step 2 and lightly mix together until just combined
Separately mix the feta, cream cheese and another 2 tbsp of milk together to form a paste. Half fill each mould in the muffin tin with the muffin mixture, add one twelfth of the feta mixture to each muffin, then top each with the remaining muffin mixture