Place warm water in the bowl of your stand mixer. Mix in the 2 tablespoons of sugar. Sprinkle yeast over the top of the water. Allow to sit for about 5 minutes or until yeast has expanded in size.
Turn mixer on to speed 2 (or low) and add melted butter, milk powder, and salt. Add flour a little at a time until you've added 3-1/3 cups and mix until well combined. Once the mixture is well combined, continue to run mixer on speed 2 for 5 minutes to knead the dough. Dough should be clinging to dough hook.
Transfer the dough to a bowl that has been coated with cooking spray or olive oil. Place a dish cloth over the bowl and allow bowl to sit in a warm place for an hour or until doubled in size.
Divide dough into 4 equal pieces. Using a rolling pin, roll dough into 8" circles.
Preheat an outdoor grill or your stove top grill to medium heat. Coat the grill with olive oil or, if using an outdoor grill, brush the top of each dough circle with olive oil and place the bread circles oil side down onto the grill. Drizzle some oilive oil on the top of the bread rounds while cooking, and watch carefully. When the bottom side is browned, turn over the bread, and grill the other side until golden. Sprinkle with garlic powder, feta cheese, and fresh basil.
Cut circles into serving size pieces with a pizza cutter.