Caramelized Onion without phyllo

For the crust: 1 x nonstick cooking spray * 3/4 cup rolled oats 1/2 cup flour, all-purpose 1/4 teaspoon salt 3 tablespoons butter, unsalted cold and cut into[...]

2 tablespoons olive oil for cooking the onions 2 large red onions peeled, halved and thinly sliced 1/2 teaspoon thyme leaves optional * 1 tablespoon balsamic[...]