INGREDIENTS
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Cooking spray
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1 (12-oz.) flank steak
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3/4 teaspoon kosher salt, divided
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1/2 teaspoon black pepper, divided
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2 teaspoons olive oil
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3/4 cup chopped white onion
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1/2 cup unsalted chicken stock (such as Swanson)
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1 (15-oz.) can unsalted pinto beans, rinsed and drained
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3 cups chopped romaine lettuce
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1 1/2 cups chopped tomato
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1 ounce tortilla chips
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1 ripe avocado, thinly sliced
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1 1/2 ounces queso fresco, crumbled (about 1/3 cup)
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4 lime wedges