• 1 pound of sirloin steak, cut into 1-inch cubes
• 1 pound of shrimp, peeled and deveined
• 1 red bell pepper, cut into chunks
• 1 yellow bell pepper, cut into chunks
• 1 red onion, cut into chunks
• 2 tablespoons olive oil
• Salt and pepper, to taste
• 8 skewers (wooden or metal)

For the chimichurri sauce, gather these fresh ingredients:

• 1 cup fresh parsley, chopped
• 1/4 cup fresh cilantro, chopped
• 3 cloves garlic, minced
• 1/2 cup olive oil
• 2 tablespoons red wine vinegar
• 1 teaspoon red pepper flakes
• Salt, to taste