Vegetarian Salisbury Steak
Ingredients:
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1 large onion, halved
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1 ½ (12 ounce) packages meatless ground beef substitute (such as Impossible™ Foods)
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¼ cup bread crumbs
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1 large egg
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1 tablespoon garlic powder, divided
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salt and ground black pepper to taste
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1 tablespoon olive oil, divided
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1 cup sliced fresh mushrooms
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1 ¾ cups vegetable broth
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¼ cup ketchup
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1 tablespoon vegan Worcestershire sauce
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2 tablespoons cornstarch
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2 tablespoons vegetable broth