Place a large skillet over medium high heat.
Add 1 teaspoon of the olive oil and then the onions.
Cook for about 5 minutes. Stir frequently.
Add the mushrooms and cook for about 10 minutes. Stir frequently.
Add the chili powder, cumin, paprika, 1/8 tsp salt, pepper, and water.
Simmer for about 10 minutes until the water has evaporated. Set aside to cool.
Place the masa in a large mixing bowl.
Add the warm water and the remaining 1/8 teaspoon salt.
Mix together until well blended. Form into a ball and let stand for 15 minutes.
Divide the masa mixture into 8 equal balls.
Press the balls flat into the palm of your hand, creating a small bowl shape.
Add 1/8 of the mushroom mixture and 1/2 ounce of goat cheese to the small depression, then fold the edges of the masa bowl over the mixture to seal the pupusa.
Repeat until you have 8 pupusas.
Gently flatten each pupusa into a 3 to 4 inch disk.
Place a non-stick griddle or skillet over high heat.
Add 1 teaspoon olive oil and then 4 of the pupusas.
Cook on the first side for 5 minutes. Adjust the heat lower if necessary, to insure that the papusas don’t burn.
Turn the pupusas over and cook for another 3 to 5 minutes, then set them aside on plates (try keeping them warm in the oven set to “warm” or 200F) while you cook the other 4 pupusas. Serve.
