Slow-Cooker Beef Tacos with Rhubarb Salsa

From: EatingWell.com, February 2017 Ingredients 2 tablespoons chili powder 1 tablespoon dried oregano 1 tablespoon ground cumin ½ teaspoon garlic powder 1½ teaspoons salt, divided 3 pounds beef chuck, trimmed and cut into 1-inch cubes 1 tablespoon avocado oil or grapeseed oil 1 large onion, halved and sliced 1 cup low-sodium beef broth 3 tablespoons…

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