For the skewers

• 800 g beef for grilling, cut into 3 cm cubes (such as sirloin, top sirloin, or flank steak)
• 120 g yellow onion, cut into chunks (1 medium onion)
• 150 g red and green bell pepper, cut into chunks (1 large bell pepper)
• 30 ml vegetable oil (2 tablespoons)
• 15 ml Worcestershire sauce (1 tablespoon)
• 10 g garlic, crushed (2 cloves)
• 5 g ground cumin (1 teaspoon)
• 4 g paprika (1 teaspoon)
• 6 g salt (1 teaspoon)
• 2 g ground black pepper (½ teaspoon)
• 8 wooden or metal skewers

For serving

• 500 g cooked or fried Colombian baby potatoes (about 4 cups)
• 8 small arepas
• 120 ml Colombian hot sauce (½ cup)
• 4 limes, cut into wedges