Preheat oven to 350F. Brush your baking pan with melted/softened butter (or spray with oil) and sprinkle with flour.
In a large bowl, whisk together the eggs, sugar, milk, flour, vanilla extract, and sea salt (all the ingredients except for the farmer's cheese and raisins).
Stir in the farmer's cheese and mix really well to combine and make sure there are no farmer's cheese clumps remaining. If using raisins, stir them in now.
Pour the batter into the prepared pan and bake at 350F for 40-60 minutes, or until the center is set and forms a thin crust (no batter stuck to the spoon when gently touched). The cheesecake will puff up and the edges will be golden brown. The baking time will depend on the size and shape of your pan, start checking on the cake after 40 minutes.
Allow to cool to room temperature before sprinkling with powdered sugar or slicing. Serve at room temperature or chilled with berry sauce, whipped cream, or ice cream.
Combine all the berries and sugar in a saucepan, turn the heat onto medium, and whisk together until the berries release juice and the sugar starts to dissolve into the juices. Cook over medium heat, stirring frequently, for 5-15 minutes. Stir in a few tablespoons of water for a thinner sauce. The cooking time depends on how saucy you like the sauce.
