Caramelized Onion and Cheese Steak Sandwich - cookrisp

Ingredients

• 300g ribeye or sirloin steak
• 1 tablespoon olive oil
• 1 teaspoon salt
• 1/2 teaspoon black pepper
• 1/2 teaspoon garlic powder
• 2 large onions, thinly sliced
• 2 tablespoons butter
• 1 teaspoon sugar
• 1/4 teaspoon salt
• 4 slices crusty bread (sourdough or ciabatta)
• 4 slices provolone or Swiss cheese
• 2 tablespoons butter, softened (for toasting)