Mix the meat, Worcestershire sauce, dijon mustard, shallot, chives, hot sauce, salt, and pepper by hand to spread evenly throughout the meat.
Now you can start to form the patties. Divide the meat into 6 or 8 equal-sized balls and roll them in your hands and flatten them out into a patty form. Keep in mind that when you grill these, they can puff up in the middle and look more like a ball than a burger. To avoid that, make an indentation in the middle of the patty by pushing down with your thumb. Once you have your patties laid out on a plate, you can drizzle a little olive oil over them.
Preheat the BBQ to about 400°F. Throw those burgers on there! Don't squeeze down on the patty with a spatula. As you see the bottom half getting brown, get ready to flip and flip once only. If you want your burger cooked medium, then I would say a good 3 to 4 minutes on each side should do it.
In a skillet, fry the bacon until the sides are crisp. Also, grill the sliced tomatoes until the sides are a bit charred.
Get the buns and add the greens, bacon, patties, and cheese. Then top with mashed avocado. Enjoy!