Fideo with Potatoes and Ground Beef (One-Pot Dinner)

Ingredients

• 1 tablespoon olive oil, plus more if needed
• 1 lb (450 g) lean ground beef
• 1 small yellow onion, diced
• 7 oz (200 g) fideo noodles or broken vermicelli
• 3 cloves garlic, minced
• 2 medium Yukon gold potatoes, cut into 1/2-inch cubes
• 2 Roma tomatoes, diced
• 1 cup (240 ml) tomato sauce
• 3 1/2 cups (830 ml) low-sodium chicken broth
• 1 teaspoon ground cumin
• 1/2 teaspoon dried Mexican oregano
• 1 teaspoon kosher salt, plus more to taste
• 1/2 teaspoon black pepper
• 1/4 cup chopped fresh cilantro
• 1 lime, cut into wedges
• Sliced avocado, optional