Grease the bottom of your baking dish well with olive oil and set aside.
In a medium size bowl combine the trahana with the milk and allow to sit for approximately 30 minutes.
1 cup sweet trahana, 2 cups milk
Then, in a large bowl combine the trahana with milk, the water (or brine from the feta), the flour, eggs, olive oil, feta and salt and pepper.
1 cup water, 2 cups flour, 4 eggs, 1 cup olive oil, 500 grams feta, crumbled, ½ tsp salt, ½ tsp pepper
Pour the mixture into your prepared baking pan and bake in the middle rack of your oven for approximately 45 minutes until set and browned slightly on top.
Remove from oven and let cool slightly before cutting the kourkoutopita and serving.