Spray a 9 inch cake pan with non-stick spray, set aside.: The faint scent of oil on the pan helps the dough glide during spreading, and a slick surface prevents sticking as the focaccia bakes. Lightly coating the pan ensures the underside develops even warmth and a golden crust. A common mistake is over spraying, which can pool oil and create greasy spots, so use a light, even mist and set the pan near your workspace so it is ready when the dough arrives.
In a large mixing bowl add yeast packet, sugar, and 1/4 cup warm water. Let sit for 5 minutes until you see foam on the top of the water.: Within minutes you will notice tiny bubbles and an aromatic, slightly yeasty scent that signals active fermentation. This foam is the most important visual cue, it shows the yeast is alive and ready to leaven the dough, and it should be frothy rather than flat. If nothing happens, the yeast may be old or water too hot, which will prevent rising. Avoid stirring aggressively during this rest, gentle stillness helps the foam form uninterrupted.
Add olive oil, remaining 1-1/2 cups warm water, and Pamela's Gluten-Free Bread Mix. Mix for three minutes.: As you combine the ingredients the bowl will fill with a slightly wet, tacky batter that smells faintly of olive oil. Mixing for the full three minutes helps hydrate the mix and encourages a uniform texture, which leads to a better crumb after baking. Use a sturdy spoon or paddle and watch for a homogeneous appearance, no dry pockets. Over mixing can introduce excess heat, so stop once evenly combined.
Sprinkle top of dough with olive oil to help spread it in the pan. Cover the dough and let rise in a warm area for 1 hour.: The glossy surface of oil makes the dough more cooperative when you spread it into the pan, and covering traps gentle warmth so the dough can expand. After about an hour you will see visible puffiness and a softer, springy feel when pressed lightly. If the room is cool, place the bowl near a warm oven or in a slightly warm spot to encourage activity. A common error is rushing the rise, which yields denser bread; patience pays off here.
Once the dough has risen preheat the oven to 400 degrees.: Preheating builds consistent oven heat so the focaccia begins baking immediately and forms structure before the interior collapses. You will hear the oven click as it reaches temperature and smell a faint warming scent. Make sure the rack is centered for even browning. Opening the oven repeatedly while preheating causes temperature drops, so avoid peeking until it is ready.
Top the dough with blueberries, goat cheese and thyme. Gently press them into the dough.: As you scatter blueberries and crumbled goat cheese , you will see color and texture contrast take shape, and the fragrant, earthy scent of thyme will lift the aroma. Gently pressing each piece anchors them so they stay visible after rising in the oven, and the berry juices will lightly stain the dough creating beautiful spots of color. Press too hard and you will flatten the air pockets, so ease them in just to the surface.
Bake for about 40 minutes until the dough is fully cooked. If the top starts browning too much cover with foil until the bread is fully cooked.: During baking you will notice a deepening golden color and a rich, warm aroma of olive oil and bread; the surface may develop small, toasted spots where cheeses and berries caramelize. A toothpick or thin skewer inserted into the center should come out clean of wet batter though it may carry berry stains. If the top browns faster than the interior cooks, tent with foil to prevent burning while allowing the center to finish. Avoid opening the oven in the first 25 minutes to maintain steady heat.