Ground Beef & Potatoes Skillet

Name: Ground Beef & Potatoes Skillet
Cook time: 50 min
Total time: 50 min
Cuisine: American
Ingredients: 3 tablespoons extra-virgin olive oil, divided; 1 pound 90% lean ground beef; 2 teaspoons ground cumin; 1 teaspoon smoked paprika; 0.75 teaspoon salt; 1/2 teaspoon cayenne pepper; 0.25 teaspoon ground pepper; 3 medium Yukon Gold potatoes, diced (1/2-inch); 1 medium yellow onion, chopped; 1 yellow bell pepper, diced (1/2-inch); 1 poblano pepper, diced (1/2-inch); 2 cloves garlic, minced; 1 bunch lacinato kale, stemmed and roughly chopped; 1 (15-oz.) can unsalted fire roasted diced tomatoes, undrained; 1 tablespoon balsamic vinegar; 1 scallion, thinly sliced crosswise (optional)