Step 1

Preheat oven to 405F / 200C, with rack in the top third. Use the butter to grease a 12-hole muffin pan and set aside, alternately, use paper liners.

Step 2

Sprinkle the olive oil and some salt and pepper over the squash. Toss well and turn onto a baking sheet or roasting pan. Arrange in a single layer and bake for 15 - 25 minutes or until cooked through entirely. Set aside to cool. You can do this step a couple days in advance, and refrigerate the squash until you're ready to use it.

Step 3

Transfer two-thirds of the squash to a large mixing bowl along with the spinach, parsley, sunflower seeds, Parmesan, two-thirds of the feta, and all of the mustard. Gently fold together. In a separate bowl beat the eggs and milk together and add to the squash mix. Sift the flour and baking powder onto the squash mix, top with the salt and a generous dose of freshly ground black pepper and fold together just until the batter comes together, be careful not to over mix.

Step 4

Spoon the mixture into the prepared pan, filling each hole 3/4 full, top each muffin with a bit of the remaining squash and feta (see photo up above). Bake for 15-20 minutes or until the tops and sides of the muffins are golden, and the muffins have set up completely. Let cool for a couple minutes then turn out onto a cooling rack. I like these muffins cooled a bit, served just warmer than room temperature.