Argentinian Beef Burgers with Chimichurri

Chimichurri

• 2 cups packed parsley leaves
• 2 cloves garlic
• 1 tablespoon McCormick Gourmet™ All Natural Mexican Oregano
• 1/2 teaspoon McCormick Gourmet™ Organic Fennel Seed, crushed
• 1/2 teaspoon McCormick Gourmet™ Organic Cayenne Red Pepper
• 1/2 cup olive oil
• 3 tablespoons lemon juice
• 1 1/2 teaspoons McCormick Gourmet™ Sicilian Sea Salt

Argentinian Beef Burgers

• 1 pound lean ground beef
• 4 slices provolone cheese
• 4 rolls, such as Kaiser or crusty artisan rolls
• 1 small red onion, thinly sliced