INGREDIENTS
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1 medium yellow onion, chopped
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Extra-virgin olive oil, for drizzling
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Four 10 to 12-ounce rib eye steaks
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1 teaspoon seasoned salt, such as Lawry's
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Freshly ground black pepper
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1/4 cup chopped garlic
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Balsamic vinegar, for drizzling
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One 12-ounce can beer (not light beer)
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6 button mushrooms
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2 red bell peppers, chopped