In a medium bowl combine yeast, water and honey. Stir to combine. Using a spatula, stir in flour, 2 teaspoons of salt, 2 tbsp olive oil, and garlic powder. Stir until no dry flour remains.
In a large bowl drizzle the remaining 2 tablespoons of olive oil in and along the sides to coat the bowl. Add dough to the bowl and cover with saran wrap sprayed with nonstick cooking spray. Turn the oven onto the lowest temperature for 1 minute and then turn off, and place the covered dough there to rise for 1 ½ hours, or until doubled in size.
Use 2 tablespoons of softened butter to generously coat a 9x13 inch pan. Once the dough has risen, add dough to the prepared pan and gently press down to fill the pan to the corners. Return to the oven, uncovered, to rise for 1 hour. (I like to heat the oven up for 1 minute again and turn it off to help with rising, just don't forget to turn the oven off!) Once risen, remove and preheat the oven to 450°. Drizzle 1 tablespoon of olive oil over the top of the dough and use your fingers poke holes down into it. Your hands will almost look like you're playing the piano! Sprinkle on the remaining ½ teaspoon of salt. Bake for 20-25 minutes, or until the top is golden brown.
While the focaccia is baking, make the sauce. In a small pan heat ¼ cup of olive oil over medium-high heat until it's hot, about 2 minutes. Add minced garlic, basil, oregano, and salt and give it a quick stir before removing from heat.
Once the focaccia is done baking, remove from the oven and spread olive oil sauce on top. Add on thawed and drained spinach and chopped tomatoes. Return to the oven for 5 minutes. Remove and add cheese, and return to the oven for 3 minutes, or until the cheese is just starting to melt. Serve immediately!