White Mushroom Pizza

Combine flour, salt, and yeast in a bowl. Add water gradually until the mixture forms a dough ball. Loosely cover and rest for 12-18 hours at room temperature.
Slice the onions thinly. Heat olive oil in a skillet over medium-low heat, sauté onions for about 45 minutes, stirring every 2-3 minutes until golden and sweet.
While the onions cook, slice mushrooms. Remove onions from skillet and cook mushrooms with salt, pepper, and thyme for about 10 minutes, until moisture evaporates.
For the sauce, melt butter in a pot over medium heat. Add minced garlic and sauté until softened, about 2 minutes. Then, whisk in cream cheese, milk, and salt until smooth and heated through, about 5 minutes.
Preheat oven to 500°F, adjusting the rack to the highest position. Sprinkle flour on your dough and form it into a 10-inch circle on a floured surface. Transfer to a non-stick pizza pan and stretch to the edges.
Spread the garlic sauce over the dough, then top with caramelized onions, sautéed mushrooms, and shredded mozzarella.
Bake in the preheated oven for 12-15 minutes or until the crust is golden brown.
Garnish with fresh parsley after baking, if desired.