Step 1 – I would suggest you prepare a day ahead before grilling. Blend the Sirloin chuck, brisket, and short rib ground beef, then mix in with some egg. Patty into 8 oz patties and then refrigerator 24 hours before using; this will help the patties stay together and don’t come apart as you are grilling them.

Step 2 – Make sure the grill is scorching hot before putting the patties on your grill. Now season the patties with salt and pepper and add a little oil. Make sure to roll the sides of the patties, so they get fully seasoned with salt and pepper.

Step 3 – Look for the hottest part on the grill, place the burger patties down on the grill. Usually about 2/3 of the top of the grill, The real secret is to move the patties as little as possible once you place the burgers patties on the grill. Make sure burgers are at room temperature 10 minutes before grilling.

Step 4 – Beginning preparing or present the burger buns as the burgers are cooking. Season buns with salt and pepper, and crisp them on both sides on the grill.

Step 5 – Season the thick-sliced onions with some salt and pepper. Add some oil and place onions on the grill as the buns and burgers are cooking.

Step 6 – Grill each burger patties for 3 1/2 to 4 minutes on both sides. Now start basting your patties by brushing them on each side. Just about two minutes before they are taking off the grill to add some more flavor.

Step 7 – Thirty seconds before patties come off the grill, you need to season the patties again. Then add your jack cheese on the top of patties to melt while burgers are still on the grill.

Step 8 – Before taking the burger patties off the grill. Setup the Brioche buns with mustard mayo blend, lettuce, and tomatoes. First, you start by placing a tablespoon full of mustard mayo blend on both sides of the top and bottom of the bun. Then gently fold the lettuce to fit onto the bun and press down to on the lettuce, making sure it stays folded.

Step 9 –  After the mustard mayo blend and lettuce. Add a thick slice of tomato on top of the lettuce, then season tomato with salt and pepper, and a dab more of mayo on top.

Step 10 – Add the burgers on each of the present dressed Brioche buns. Place the grilled onions on top of each patty; finish by placing the top bun.