Caramelized Onion Gruyere Dip without eggs

cooking spray 3/4 cup rolled oats 1/2 cup all-purpose flour 1/4 teaspoon salt 3 tablespoons unsalted butter , cold, cut into small pieces 3 tablespoons cold[...]

1 loaf sourdough bread (a round loaf) 2 tablespoons unsalted butter 1 tablespoon olive oil 2 medium sweet onions , coarsely chopped (Vidalia onions) 1[...]

2 tablespoons unsalted butter 1 tablespoon olive oil 2 medium sweet onions , coarsley chopped (such as vidalia) 1 teaspoon salt 1 teaspoon sugar 1 teaspoon[...]