Set Global Sun Oven out to preheat. Coat a 9-inch pie pan with cooking spray, set aside.
Heat the oil in a large skillet over medium-high heat. Add the onions, garlic, and sugar. Cook mixture, stirring occasionally, until the onions are lightly golden, about 8 minutes. Stir in the spinach. Remove from heat and let cool 10 minutes.
Cut the dough in half, place one half of the dough on a lightly floured surface and shape into a 4-inch circle, cover with plastic wrap and let rest 10 minutes (wrap the other half with plastic wrap and refrigerate for another use). Roll the dough into an 11-inch circle, fit the dough into the pie pan, and flute the edges.
Combine the eggs, sour cream, salt, and pepper in a medium bowl. Sprinkle the cheese over the bottom of the pie crust. Top evenly with the spinach mixture, then pour in the egg mixture. Arrange the tomato halves, cut side up on top of the quiche. Bake in the Sun Oven until the center is set, about 1 hour. Let stand at room temperature for 10 minutes before cutting.
This Sun Oven Pizza Dough Quiche recipe is from the Sun Oven Cooking Cookbook. Download this Cookbook today.
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