Jamie Oliver 5 Ingredients Spinach and Feta Pie is made with frozen spinach, self-raising flour, dill, feta cheese, and sesame seeds. This tasty Spinach and Feta Pie recipe creates a delicious and savory dinner that takes about 40 minutes to prepare and can serve up to 6 people. This Spinach and Feta Pie Recipe Is From 5 Ingredients Mediterranean Cookbook by Jamie Oliver.