Cheddar Stuffed Burgers with chopped onion

• 1 1/2 pounds ground chuck (80% lean)
• 1/2 cup finely chopped yellow onion
• 1 tsp kosher or sea salt
• 3/4 tsp granulated garlic
• fresh ground black pepper

Toppings:

• 4 slices cheddar cheese, stacked and quartered to make 4 blocks, each about 1/14 inches square and 1/2 inch thick.
• 4 hamburger buns, split
• Sweet & Spicy Tomato Chutney

To Make:

1. Mix the patty ingredients, and then gently form 8 even sized patties, each about 1/2 inch thick. Place 4 patties on a clean work surface and center a cheese block on top of each. Center the remaining 4 patties over the top and press down until each double patty is about 1 inch thick. Pinch the edges together tightly to seal the cheese inside. Refrigerate the patties until ready to grill.

2. Prepare the grill for direct cooking over medium high heat.

3. Grill the patties over direct medium-high heat, with the lid closed, until cooked to medium doneness, 9-11 minutes turning once. Don't worry if a little cheese leaks out. During the last 30 seconds to 1 minute of grilling time, toast the buns, cut side down, over direct heat.

4. Build each burger on a bun with a patty and then some Sweet & Spicy Tomato Chutney