Caramelized Onion without stems

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[...]

1 tablespoon olive oil 8 cups vertically sliced yellow onion (about 2 pounds) 5 cups sliced shiitake mushroom caps (about 10 ounces whole mushrooms) 4 garlic[...]

1 tablespoon olive oil 8 cups sliced yellow onions (about 2 lbs) 5 cups sliced shiitake mushroom caps (about 10 oz whole mushrooms) 4 garlic cloves , minced 2[...]